Telegram Mini Apps

With Mini Apps developers can use JavaScript to create infinitely flexible interfaces that can be launched right inside Telegram — and can completely replace any website.

Like bots, Mini Apps support seamless authorization, integrated payments via 20 payment providers (with Google Pay and Apple Pay out of the box), delivering tailored push notifications to users, and much more.

To see a Mini App in action, try our sample @DurgerKingBot.

Recent changes

November 17, 2024

Bot API 8.0

This is the largest update in the history of Telegram mini apps – adding more than 10 new features and monetization options for developers. To read more about all these changes, check out this dedicated blog post.

Full-screen Mode

Mini Apps are now able to become full-screen in both portrait and landscape mode – allowing them to host more games, play widescreen media and support immersive user experiences.
Added the methods requestFullscreen and exitFullscreen to toggle full-screen mode.
Added the fields safeAreaInset and contentSafeAreaInset, allowing Mini Apps to ensure that their content properly respects the device's safe area margins.
Further added the fields isActive and isFullscreen to the class WebApp.
Added the events activated, deactivated, safeAreaChanged, contentSafeAreaChanged, fullscreenChanged and fullscreenFailed.

Homescreen Shortcuts

Mini Apps can now be accessed via direct shortcuts added to the home screen of mobile devices.
Added the method addToHomeScreen to create a shortcut for users to add to their home screens.
Added the method checkHomeScreenStatus to determine the status and support of the home screen shortcut for the Mini App on the current device.
Added the events homeScreenAdded and homeScreenChecked.

Emoji Status

Mini Apps can now prompt users to set their emoji status – or request access to later sync it automatically with in-game badges, third-party APIs and more.
Added the method setEmojiStatus to let users manually confirm a custom emoji as their new status via a native dialog.
Added the method requestEmojiStatusAccess for obtaining permission to later update a user's emoji status via the Bot API method setUserEmojiStatus.
Added the events emojiStatusSet, emojiStatusFailed and emojiStatusAccessRequested.

Media Sharing and File Downloads

Users can now share media directly from Mini Apps – sending referral codes, custom memes, artwork and more to any chat or posting them as a story.
Added the method shareMessage to share media from Mini Apps to Telegram chats. Also see PreparedInlineMessage.
Added the method downloadFile, introducing support for a native popup that prompts users to download files from the Mini App.
Added the events shareMessageSent, shareMessageFailed and fileDownloadRequested.

Geolocation Access

Mini Apps can now request geolocation access to users, allowing them to build virtually any location-based service, from games with dynamic points of interest to interactive maps for events.
Added the field LocationManager to the class WebApp.
Added the events locationManagerUpdated and locationRequested.

Device Motion Tracking

Mini Apps can now track detailed device motion data, allowing them to implement better productivity tools, immersive VR experiences and more.
Added the fields isOrientationLocked, Accelerometer, DeviceOrientation and Gyroscope to the class WebApp.
Added the methods lockOrientation and unlockOrientation to control the screen orientation.
Added the events accelerometerStarted, accelerometerStopped, accelerometerChanged, accelerometerFailed, deviceOrientationStarted, deviceOrientationStopped, deviceOrientationChanged, deviceOrientationFailed, gyroscopeStarted, gyroscopeStopped, gyroscopeChanged, gyroscopeFailed.

Subscription Plans and Gifts for Telegram Stars

Mini Apps now support paid subscriptions powered by Telegram Stars – monetizing their efforts with multiple tiers of content and features.
Mini Apps can use their balance of Telegram Stars to send gifts to their users.
You can read more on implementing Paid Subscriptions and Gifts in our Bot API documentation.

Loading Screen Customization

Mini Apps can customize their loading screen, adding their own icon and specific colors for light and dark themes.
You can access these customization settings in @BotFather via /mybots > Select Bot > Bot Settings > Configure Mini App > Enable Mini App

Hardware-specific Optimizations

Mini Apps running on Android can now receive basic information about a device's processing hardware, allowing them to optimize user experience based on the device's capabilities.
This information includes the OS, App and SDK's respective versions as well as the device's model and performance class.

General

The field photo_url in the class WebAppUser is now available to all Mini Apps, allowing them to access a user's profile photo if their privacy settings allow for it.
Third parties (e.g., Mini App builders, external SDKs etc.) that receive or process data on behalf of Mini Apps are now able to validate it without knowing the App's bot token.
Debugging options have been expanded to include full support for iOS devices. You can use these tools to find app-specific issues in your Mini App.

September 6, 2024

Bot API 7.10

Added the field SecondaryButton to the class WebApp.
Added the event secondaryButtonClicked.
Renamed the class MainButton to the class BottomButton.
Added the field bottomBarColor and the method setBottomBarColor to the class WebApp.
Added the field bottom_bar_bg_color to the class ThemeParams.

July 31, 2024

Bot API 7.8

Added the option for bots to set a Main Mini App, which can be previewed and launched directly from a button in the bot's profile or a link.
Added the method shareToStory to the class WebApp.

July 7, 2024

Bot API 7.7

Added the field isVerticalSwipesEnabled and the methods enableVerticalSwipes, disableVerticalSwipes to the class WebApp.
Added the event scanQrPopupClosed.

July 1, 2024

Bot API 7.6

Added the field section_separator_color to the class ThemeParams.
Changed the default opening mode for Direct Link Mini Apps.

March 31, 2024

Bot API 7.2

Added the field BiometricManager to the class WebApp.

December 29, 2023

Bot API 7.0

Added the field SettingsButton to the class WebApp.
Added the fields header_bg_color, accent_text_color, section_bg_color, section_header_text_color, subtitle_text_color, destructive_text_color to the class ThemeParams.
Mini Apps no longer close when the method WebApp.openTelegramLink is called.

September 22, 2023

Bot API 6.9

Added the field CloudStorage to the class WebApp.
Added the methods requestWriteAccess and requestContact to the class WebApp.
Added the fields added_to_attachment_menu and allows_write_to_pm to the class WebAppUser.
Added the events writeAccessRequested and contactRequested.
Added the ability to set any header color using the setHeaderColor method.

April 21, 2023

Bot API 6.7

Added support for launching Mini Apps from inline query results and from a direct link.
Added the method switchInlineQuery to the class WebApp.

December 30, 2022

Bot API 6.4

Added the field platform, the optional parameter options to the method openLink and the methods showScanQrPopup, closeScanQrPopup, readTextFromClipboard to the class WebApp.
Added the events qrTextReceived, clipboardTextReceived.

August 12, 2022

Bot API 6.2

Added the field isClosingConfirmationEnabled and the methods enableClosingConfirmation, disableClosingConfirmation, showPopup, showAlert, showConfirm to the class WebApp.
Added the field is_premium to the class WebAppUser.
Added the event popupClosed.

June 20, 2022

Bot API 6.1

Added the ability to use bots added to the attachment menu in group, supergroup and channel chats.
Added support for t.me links that can be used to select the chat in which the attachment menu with the bot will be opened.
Added the fields version, headerColor, backgroundColor, BackButton, HapticFeedback and the methods isVersionAtLeast, setHeaderColor, setBackgroundColor, openLink, openTelegramLink, openInvoice to the class WebApp.
Added the field secondary_bg_color to the class ThemeParams.
Added the method offClick to the class MainButton.
Added the fields chat, can_send_after to the class WebAppInitData.
Added the events backButtonClicked, settingsButtonClicked, invoiceClosed.

Designing Mini Apps

Color Schemes

Mini Apps always receive data about the user's current color theme in real time, so you can adjust the appearance of your interfaces to match it. For example, when users switch between Day and Night modes or use various custom themes.

Jump to technical information

Design Guidelines

Telegram apps are known for being snappy, smooth and following a consistent cross-platform design. Your Mini App should ideally reflect these principles.

All elements should be responsive and designed with a mobile-first approach.
Interactive elements should mimic the style, behavior, and intent of UI components that already exist.
All included animations should be smooth, ideally 60fps.
All inputs and images should contain labels for accessibility purposes.
The app should deliver a seamless experience by monitoring the dynamic theme-based colors provided by the API and using them accordingly.
Ensure that the app’s interface respects the safe area and content safe area to avoid overlapping with control elements, especially when using fullscreen mode.
For Android devices, consider the additional information in the User-Agent (see User-Agent details) and adjust for the device’s performance class, minimizing animations and visual effects on low-performance devices to ensure smooth performance.

Implementing Mini Apps

Telegram currently supports seven different ways of launching Mini Apps: the main Mini App from a profile button, from a keyboard button, from an inline button, from the bot menu button, via inline mode, from a direct link – and even from the attachment menu.

Keyboard Button Mini Apps

TL;DR: Mini Apps launched from a web_app type keyboard button can send data back to the bot in a service message using Telegram.WebApp.sendData. This makes it possible for the bot to produce a response without communicating with any external servers.

Users can interact with bots using custom keyboards, buttons under bot messages, as well as by sending freeform text messages or any of the attachment types supported by Telegram: photos and videos, files, locations, contacts and polls. For even more flexibility, bots can utilize the full power of HTML5 to create user-friendly input interfaces.

You can send a web_app type KeyboardButton that opens a Mini App from the specified URL.

To transmit data from the user back to the bot, the Mini App can call the Telegram.WebApp.sendData method. Data will be transmitted to the bot as a String in a service message. The bot can continue communicating with the user after receiving it.

Good for:

Сustom data input interfaces (a personalized calendar for selecting dates; selecting data from a list with advanced search options; a randomizer that lets the user “spin a wheel” and chooses one of the available options, etc.)
Reusable components that do not depend on a particular bot.

Inline Button Mini Apps

TL;DR: For more interactive Mini Apps like @DurgerKingBot, use a web_app type Inline KeyboardButton, which gets basic user information and can be used to send a message on behalf of the user to the chat with the bot.

If receiving text data alone is insufficient or you need a more advanced and personalized interface, you can open a Mini App using a web_app type Inline KeyboardButton.

From the button, a Mini App will open with the URL specified in the button. In addition to the user's theme settings, it will receive basic user information (ID, name, username, language_code) and a unique identifier for the session, query_id, which allows messages on behalf of the user to be sent back to the bot.

The bot can call the Bot API method answerWebAppQuery to send an inline message from the user back to the bot and close the Mini App. After receiving the message, the bot can continue communicating with the user.

Good for:

Fully-fledged web services and integrations of any kind.
The use cases are effectively unlimited.

Launching Mini Apps from the Menu Button

TL;DR: Mini Apps can be launched from a customized menu button. This simply offers a quicker way to access the app and is otherwise identical to launching a mini app from an inline button.

By default, chats with bots always show a convenient menu button that provides quick access to all listed commands. With Bot API 6.0, this button can be used to launch a Mini App instead.

To configure the menu button, you must specify the text it should show and the Mini App URL. There are two ways to set these parameters:

To customize the button for all users, use @BotFather (the /setmenubutton command or Bot Settings > Menu Button).
To customize the button for both all users and specific users, use the setChatMenuButton method in the Bot API. For example, change the button text according to the user's language, or show links to different Mini Apps based on a user's settings in your bot.

Apart from this, Mini Apps opened via the menu button work in the exact same way as when using inline buttons.

@DurgerKingBot allows launching its Mini App both from an inline button and from the menu button.

Launching the main Mini App

TL;DR: If your bot is a mini app, you can add a prominent Launch app button as well as high-quality demo videos and screenshots to the bot’s profile. To do this, go to @BotFather and set up your bot's Main Mini App.

If your bot is a mini app, you can unlock a number of features that streamline and simplify the way in which users view and interact with it. To do this, go to @BotFather and set up your bot's Main Mini App.

After setting a main mini app, you'll be able to upload detailed media preview demos to publicly highlight your app's key features on its profile. A Launch app button will also appear, allowing users to open your app directly from its profile. Bots that enabled a main mini app will be displayed in the Apps tab of the search for users who have launched them.

Media previews support multiple languages – so you can upload translated versions of your previews that will be shown to users based on their app language.

A bot's main Mini App can also be opened in the current chat by direct link in the format https://t.me/botusername?startapp. If a non-empty startapp parameter is included in the link, it will be passed to the Mini App in the start_param field and in the GET parameter tgWebAppStartParam.

Examples

https://t.me/botusername?startapp
https://t.me/botusername?startapp=command
https://t.me/botusername?startapp=command&mode=compact

In this mode, Mini Apps can use the chat_type and chat_instance parameters to keep track of the current chat context. This introduces support for concurrent and shared usage by multiple chat members – to create live whiteboards, group orders, multiplayer games and similar apps.

By default, the main Mini App opens to full-screen height, and users cannot reduce them to half-height. However, you can change this behavior via @BotFather or by including the parameter mode=compact in the link to the Mini App, in which case it will open to half-screen height by default.

Good for:

Fully-fledged web services and integrations that any user can open in one tap.
Cooperative, multiplayer or teamwork-oriented services within a chat context.
The use cases are effectively unlimited.

Successful bots which enable a main Mini App and accept payments in Telegram Stars may be featured in the Telegram Mini App Store. To increase the chances of being featured, we recommend uploading high-quality media showcasing your app on your bot's profile and following our design guidelines.

Inline Mode Mini Apps

TL;DR: Mini Apps launched via web_app type InlineQueryResultsButton can be used anywhere in inline mode. Users can create content in a web interface and then seamlessly send it to the current chat via inline mode.

You can use the button parameter in the answerInlineQuery method to display a special 'Switch to Mini App' button either above or in place of the inline results. This button will open a Mini App from the specified URL. Once done, you can call the Telegram.WebApp.switchInlineQuery method to send the user back to inline mode.

Inline Mini Apps have no access to the chat – they can't read messages or send new ones on behalf of the user. To send messages, the user must be redirected to inline mode and actively pick a result.

Good for:

Fully-fledged web services and integrations in inline mode.

Direct Link Mini Apps

TL;DR: Mini App Bots can be launched from a direct link in any chat. They support a startapp parameter and are aware of the current chat context.

You can use direct links to open a Mini App directly in the current chat. If a non-empty startapp parameter is included in the link, it will be passed to the Mini App in the start_param field and in the GET parameter tgWebAppStartParam.

Mini Apps opened from a direct link have no access to the chat – they can't read messages or send new ones on behalf of the user. To send messages, the user must be redirected to inline mode and actively pick a result.

Starting from Bot API 7.6, by default, Mini Apps of this type open to full-screen height, and users cannot reduce them to half-height. However, you can change this behavior by including the parameter mode=compact in the link to the Mini App, in which case it will open to half-screen height by default.

Examples

https://t.me/botusername/appname
https://t.me/botusername/appname?startapp=command
https://t.me/botusername/appname?startapp=command&mode=compact

Good for:

Fully-fledged web services and integrations that any user can open in one tap.
Cooperative, multiplayer or teamwork-oriented services within a chat context.
The use cases are effectively unlimited.

Launching Mini Apps from the Attachment Menu

TL;DR: Mini App Bots can request to be added directly to a user's attachment menu, allowing them to be quickly launched from any chat. To try this mode, open this attachment menu link for @DurgerKingBot, then use the menu in any type of chat.

Mini App Bots can request to be added directly to a user's attachment menu, allowing them to be quickly launched from any type of chat. You can configure in which types of chats your mini app can be started from the attachment menu (private, groups, supergroups or channels).

Attachment menu integration is currently only available for major advertisers on the Telegram Ad Platform. However, all bots can use it in the test server environment.

To enable this feature for your bot, open @BotFather from an account on the test server and send the /setattach command – or go to Bot Settings > Configure Attachment Menu. Then specify the URL that will be opened to launch the bot's Mini App via its icon in the attachment menu.

You can add a 'Settings' item to the context menu of your Mini App using @BotFather. When users select this option from the menu, your bot will receive a settingsButtonClicked event.

In addition to the user's theme settings, the bot will receive basic user information (ID, name, username, language_code, photo), as well as public info about the chat partner (ID, name, username, photo) or the chat info (ID, type, title, username, photo) and a unique identifier for the web view session query_id, which allows messages of any type to be sent to the chat on behalf of the user that opened the bot.

The bot can call the Bot API method answerWebAppQuery, which sends an inline message from the user via the bot to the chat where it was launched and closes the Mini App.

You can read more about adding bots to the attachment menu here.

Initializing Mini Apps

To connect your Mini App to the Telegram client, place the script telegram-web-app.js in the <head> tag before any other scripts, using this code:

<script src="https://telegram.org/js/telegram-web-app.js?56"></script>

Once the script is connected, a window.Telegram.WebApp object will become available with the following fields:

Field	Type	Description
initData	String	A string with raw data transferred to the Mini App, convenient for validating data. WARNING: Validate data from this field before using it on the bot's server.
initDataUnsafe	WebAppInitData	An object with input data transferred to the Mini App. WARNING: Data from this field should not be trusted. You should only use data from initData on the bot's server and only after it has been validated.
version	String	The version of the Bot API available in the user's Telegram app.
platform	String	The name of the platform of the user's Telegram app.
colorScheme	String	The color scheme currently used in the Telegram app. Either “light” or “dark”. Also available as the CSS variable `var(--tg-color-scheme)`.
themeParams	ThemeParams	An object containing the current theme settings used in the Telegram app.
isActive ^NEW	Boolean	Bot API 8.0+ True, if the Mini App is currently active. False, if the Mini App is minimized.
isExpanded	Boolean	True, if the Mini App is expanded to the maximum available height. False, if the Mini App occupies part of the screen and can be expanded to the full height using the expand() method.
viewportHeight	Float	The current height of the visible area of the Mini App. Also available in CSS as the variable `var(--tg-viewport-height)`. The application can display just the top part of the Mini App, with its lower part remaining outside the screen area. From this position, the user can “pull” the Mini App to its maximum height, while the bot can do the same by calling the expand() method. As the position of the Mini App changes, the current height value of the visible area will be updated in real time. Please note that the refresh rate of this value is not sufficient to smoothly follow the lower border of the window. It should not be used to pin interface elements to the bottom of the visible area. It's more appropriate to use the value of the `viewportStableHeight` field for this purpose.
viewportStableHeight	Float	The height of the visible area of the Mini App in its last stable state. Also available in CSS as a variable `var(--tg-viewport-stable-height)`. The application can display just the top part of the Mini App, with its lower part remaining outside the screen area. From this position, the user can “pull” the Mini App to its maximum height, while the bot can do the same by calling the expand() method. Unlike the value of `viewportHeight`, the value of `viewportStableHeight` does not change as the position of the Mini App changes with user gestures or during animations. The value of `viewportStableHeight` will be updated after all gestures and animations are completed and the Mini App reaches its final size. Note the event `viewportChanged` with the passed parameter `isStateStable=true`, which will allow you to track when the stable state of the height of the visible area changes.
headerColor	String	Current header color in the `#RRGGBB` format.
backgroundColor	String	Current background color in the `#RRGGBB` format.
bottomBarColor	String	Current bottom bar color in the `#RRGGBB` format.
isClosingConfirmationEnabled	Boolean	True, if the confirmation dialog is enabled while the user is trying to close the Mini App. False, if the confirmation dialog is disabled.
isVerticalSwipesEnabled	Boolean	True, if vertical swipes to close or minimize the Mini App are enabled. False, if vertical swipes to close or minimize the Mini App are disabled. In any case, the user will still be able to minimize and close the Mini App by swiping the Mini App's header.
isFullscreen ^NEW	Boolean	True, if the Mini App is currently being displayed in fullscreen mode.
isOrientationLocked ^NEW	Boolean	True, if the Mini App’s orientation is currently locked. False, if orientation changes freely based on the device’s rotation.
safeAreaInset ^NEW	SafeAreaInset	An object representing the device's safe area insets, accounting for system UI elements like notches or navigation bars.
contentSafeAreaInset ^NEW	ContentSafeAreaInset	An object representing the safe area for displaying content within the app, free from overlapping Telegram UI elements.
BackButton	BackButton	An object for controlling the back button which can be displayed in the header of the Mini App in the Telegram interface.
MainButton	BottomButton	An object for controlling the main button, which is displayed at the bottom of the Mini App in the Telegram interface.
SecondaryButton	BottomButton	An object for controlling the secondary button, which is displayed at the bottom of the Mini App in the Telegram interface.
SettingsButton	SettingsButton	An object for controlling the Settings item in the context menu of the Mini App in the Telegram interface.
HapticFeedback	HapticFeedback	An object for controlling haptic feedback.
CloudStorage	CloudStorage	An object for controlling cloud storage.
BiometricManager	BiometricManager	An object for controlling biometrics on the device.
Accelerometer ^NEW	Accelerometer	An object for accessing accelerometer data on the device.
DeviceOrientation ^NEW	DeviceOrientation	An object for accessing device orientation data on the device.
Gyroscope ^NEW	Gyroscope	An object for accessing gyroscope data on the device.
LocationManager ^NEW	LocationManager	An object for controlling location on the device.
isVersionAtLeast(version)	Function	Returns true if the user's app supports a version of the Bot API that is equal to or higher than the version passed as the parameter.
setHeaderColor(color)	Function	Bot API 6.1+ A method that sets the app header color in the `#RRGGBB` format. You can also use keywords bg_color and secondary_bg_color. Up to Bot API 6.9 You can only pass Telegram.WebApp.themeParams.bg_color or Telegram.WebApp.themeParams.secondary_bg_color as a color or bg_color, secondary_bg_color keywords.
setBackgroundColor(color)	Function	Bot API 6.1+ A method that sets the app background color in the `#RRGGBB` format. You can also use keywords bg_color and secondary_bg_color.
setBottomBarColor(color)	Function	Bot API 7.10+ A method that sets the app's bottom bar color in the `#RRGGBB` format. You can also use the keywords bg_color, secondary_bg_color, and bottom_bar_bg_color. This color is also applied to the navigation bar on Android.
enableClosingConfirmation()	Function	Bot API 6.2+ A method that enables a confirmation dialog while the user is trying to close the Mini App.
disableClosingConfirmation()	Function	Bot API 6.2+ A method that disables the confirmation dialog while the user is trying to close the Mini App.
enableVerticalSwipes()	Function	Bot API 7.7+ A method that enables vertical swipes to close or minimize the Mini App. For user convenience, it is recommended to always enable swipes unless they conflict with the Mini App's own gestures.
disableVerticalSwipes()	Function	Bot API 7.7+ A method that disables vertical swipes to close or minimize the Mini App. This method is useful if your Mini App uses swipe gestures that may conflict with the gestures for minimizing and closing the app.
requestFullscreen() ^NEW	Function	Bot API 8.0+ A method that requests opening the Mini App in fullscreen mode. Although the header is transparent in fullscreen mode, it is recommended that the Mini App sets the header color using the setHeaderColor method. This color helps determine a contrasting color for the status bar and other UI controls.
exitFullscreen() ^NEW	Function	Bot API 8.0+ A method that requests exiting fullscreen mode.
lockOrientation() ^NEW	Function	Bot API 8.0+ A method that locks the Mini App’s orientation to its current mode (either portrait or landscape). Once locked, the orientation remains fixed, regardless of device rotation. This is useful if a stable orientation is needed during specific interactions.
unlockOrientation() ^NEW	Function	Bot API 8.0+ A method that unlocks the Mini App’s orientation, allowing it to follow the device's rotation freely. Use this to restore automatic orientation adjustments based on the device orientation.
addToHomeScreen() ^NEW	Function	Bot API 8.0+ A method that prompts the user to add the Mini App to the home screen. After successfully adding the icon, the `homeScreenAdded` event will be triggered if supported by the device. Note that if the device cannot determine the installation status, the event may not be received even if the icon has been added.
checkHomeScreenStatus([callback]) ^NEW	Function	Bot API 8.0+ A method that checks if adding to the home screen is supported and if the Mini App has already been added. If an optional callback parameter is provided, the callback function will be called with a single argument status, which is a string indicating the home screen status. Possible values for status are: - unsupported – the feature is not supported, and it is not possible to add the icon to the home screen, - unknown – the feature is supported, and the icon can be added, but it is not possible to determine if the icon has already been added, - added – the icon has already been added to the home screen, - missed – the icon has not been added to the home screen.
onEvent(eventType, eventHandler)	Function	A method that sets the app event handler. Check the list of available events.
offEvent(eventType, eventHandler)	Function	A method that deletes a previously set event handler.
sendData(data)	Function	A method used to send data to the bot. When this method is called, a service message is sent to the bot containing the data data of the length up to 4096 bytes, and the Mini App is closed. See the field web_app_data in the class Message. This method is only available for Mini Apps launched via a Keyboard button.
switchInlineQuery(query[, choose_chat_types])	Function	Bot API 6.7+ A method that inserts the bot's username and the specified inline query in the current chat's input field. Query may be empty, in which case only the bot's username will be inserted. If an optional choose_chat_types parameter was passed, the client prompts the user to choose a specific chat, then opens that chat and inserts the bot's username and the specified inline query in the input field. You can specify which types of chats the user will be able to choose from. It can be one or more of the following types: users, bots, groups, channels.
openLink(url[, options])	Function	A method that opens a link in an external browser. The Mini App will not be closed. Bot API 6.4+ If the optional options parameter is passed with the field try_instant_view=true, the link will be opened in Instant View mode if possible. Note that this method can be called only in response to user interaction with the Mini App interface (e.g. a click inside the Mini App or on the main button)
openTelegramLink(url)	Function	A method that opens a telegram link inside the Telegram app. The Mini App will not be closed after this method is called. Up to Bot API 7.0 The Mini App will be closed after this method is called.
openInvoice(url[, callback])	Function	Bot API 6.1+ A method that opens an invoice using the link url. The Mini App will receive the event invoiceClosed when the invoice is closed. If an optional callback parameter was passed, the callback function will be called and the invoice status will be passed as the first argument.
shareToStory(media_url[, params])	Function	Bot API 7.8+ A method that opens the native story editor with the media specified in the media_url parameter as an HTTPS URL. An optional params argument of the type StoryShareParams describes additional sharing settings.
shareMessage(msg_id[, callback]) ^NEW	Function	Bot API 8.0+ A method that opens a dialog allowing the user to share a message provided by the bot. If an optional callback parameter is provided, the callback function will be called with a boolean as the first argument, indicating whether the message was successfully sent. The message id passed to this method must belong to a PreparedInlineMessage previously obtained via the Bot API method savePreparedInlineMessage.
setEmojiStatus(custom_emoji_id[, params, callback])	Function	Bot API 8.0+ A method that opens a dialog allowing the user to set the specified custom emoji as their status. An optional params argument of type EmojiStatusParams specifies additional settings, such as duration. If an optional callback parameter is provided, the callback function will be called with a boolean as the first argument, indicating whether the status was set. Note: this method opens a native dialog and cannot be used to set the emoji status without manual user interaction. For fully programmatic changes, you should instead use the Bot API method setUserEmojiStatus after obtaining authorization to do so via the Mini App method requestEmojiStatusAccess.
requestEmojiStatusAccess([callback]) ^NEW	Function	Bot API 8.0+ A method that shows a native popup requesting permission for the bot to manage user's emoji status. If an optional callback parameter was passed, the callback function will be called when the popup is closed and the first argument will be a boolean indicating whether the user granted this access.
downloadFile(params[, callback]) ^NEW	Function	Bot API 8.0+ A method that displays a native popup prompting the user to download a file specified by the params argument of type DownloadFileParams. If an optional callback parameter is provided, the callback function will be called when the popup is closed, with the first argument as a boolean indicating whether the user accepted the download request.
showPopup(params[, callback])	Function	Bot API 6.2+ A method that shows a native popup described by the params argument of the type PopupParams. The Mini App will receive the event popupClosed when the popup is closed. If an optional callback parameter was passed, the callback function will be called and the field id of the pressed button will be passed as the first argument.
showAlert(message[, callback])	Function	Bot API 6.2+ A method that shows message in a simple alert with a 'Close' button. If an optional callback parameter was passed, the callback function will be called when the popup is closed.
showConfirm(message[, callback])	Function	Bot API 6.2+ A method that shows message in a simple confirmation window with 'OK' and 'Cancel' buttons. If an optional callback parameter was passed, the callback function will be called when the popup is closed and the first argument will be a boolean indicating whether the user pressed the 'OK' button.
showScanQrPopup(params[, callback])	Function	Bot API 6.4+ A method that shows a native popup for scanning a QR code described by the params argument of the type ScanQrPopupParams. The Mini App will receive the event qrTextReceived every time the scanner catches a code with text data. If an optional callback parameter was passed, the callback function will be called and the text from the QR code will be passed as the first argument. Returning true inside this callback function causes the popup to be closed. Starting from Bot API 7.7, the Mini App will receive the scanQrPopupClosed event if the user closes the native popup for scanning a QR code.
closeScanQrPopup()	Function	Bot API 6.4+ A method that closes the native popup for scanning a QR code opened with the showScanQrPopup method. Run it if you received valid data in the event qrTextReceived.
readTextFromClipboard([callback])	Function	Bot API 6.4+ A method that requests text from the clipboard. The Mini App will receive the event clipboardTextReceived. If an optional callback parameter was passed, the callback function will be called and the text from the clipboard will be passed as the first argument. Note: this method can be called only for Mini Apps launched from the attachment menu and only in response to a user interaction with the Mini App interface (e.g. a click inside the Mini App or on the main button).
requestWriteAccess([callback])	Function	Bot API 6.9+ A method that shows a native popup requesting permission for the bot to send messages to the user. If an optional callback parameter was passed, the callback function will be called when the popup is closed and the first argument will be a boolean indicating whether the user granted this access.
requestContact([callback])	Function	Bot API 6.9+ A method that shows a native popup prompting the user for their phone number. If an optional callback parameter was passed, the callback function will be called when the popup is closed and the first argument will be a boolean indicating whether the user shared its phone number.
ready()	Function	A method that informs the Telegram app that the Mini App is ready to be displayed. It is recommended to call this method as early as possible, as soon as all essential interface elements are loaded. Once this method is called, the loading placeholder is hidden and the Mini App is shown. If the method is not called, the placeholder will be hidden only when the page is fully loaded.
expand()	Function	A method that expands the Mini App to the maximum available height. To find out if the Mini App is expanded to the maximum height, refer to the value of the Telegram.WebApp.isExpanded parameter
close()	Function	A method that closes the Mini App.

ThemeParams

Mini Apps can adjust the appearance of the interface to match the Telegram user's app in real time. This object contains the user's current theme settings:

Field	Type	Description
bg_color	String	Optional. Background color in the `#RRGGBB` format. Also available as the CSS variable `var(--tg-theme-bg-color)`.
text_color	String	Optional. Main text color in the `#RRGGBB` format. Also available as the CSS variable `var(--tg-theme-text-color)`.
hint_color	String	Optional. Hint text color in the `#RRGGBB` format. Also available as the CSS variable `var(--tg-theme-hint-color)`.
link_color	String	Optional. Link color in the `#RRGGBB` format. Also available as the CSS variable `var(--tg-theme-link-color)`.
button_color	String	Optional. Button color in the `#RRGGBB` format. Also available as the CSS variable `var(--tg-theme-button-color)`.
button_text_color	String	Optional. Button text color in the `#RRGGBB` format. Also available as the CSS variable `var(--tg-theme-button-text-color)`.
secondary_bg_color	String	Optional. Bot API 6.1+ Secondary background color in the `#RRGGBB` format. Also available as the CSS variable `var(--tg-theme-secondary-bg-color)`.
header_bg_color	String	Optional. Bot API 7.0+ Header background color in the `#RRGGBB` format. Also available as the CSS variable `var(--tg-theme-header-bg-color)`.
bottom_bar_bg_color	String	Optional. Bot API 7.10+ Bottom background color in the `#RRGGBB` format. Also available as the CSS variable `var(--tg-theme-bottom-bar-bg-color)`.
accent_text_color	String	Optional. Bot API 7.0+ Accent text color in the `#RRGGBB` format. Also available as the CSS variable `var(--tg-theme-accent-text-color)`.
section_bg_color	String	Optional. Bot API 7.0+ Background color for the section in the `#RRGGBB` format. It is recommended to use this in conjunction with secondary_bg_color. Also available as the CSS variable `var(--tg-theme-section-bg-color)`.
section_header_text_color	String	Optional. Bot API 7.0+ Header text color for the section in the `#RRGGBB` format. Also available as the CSS variable `var(--tg-theme-section-header-text-color)`.
section_separator_color	String	Optional. Bot API 7.6+ Section separator color in the `#RRGGBB` format. Also available as the CSS variable `var(--tg-theme-section-separator-color)`.
subtitle_text_color	String	Optional. Bot API 7.0+ Subtitle text color in the `#RRGGBB` format. Also available as the CSS variable `var(--tg-theme-subtitle-text-color)`.
destructive_text_color	String	Optional. Bot API 7.0+ Text color for destructive actions in the `#RRGGBB` format. Also available as the CSS variable `var(--tg-theme-destructive-text-color)`.

StoryShareParams

This object describes additional sharing settings for the native story editor.

Field	Type	Description
text	String	Optional. The caption to be added to the media, 0-200 characters for regular users and 0-2048 characters for premium subscribers.
widget_link	StoryWidgetLink	Optional. An object that describes a widget link to be included in the story. Note that only premium subscribers can post stories with links.

StoryWidgetLink

This object describes a widget link to be included in the story.

Field	Type	Description
url	String	The URL to be included in the story.
name	String	Optional. The name to be displayed for the widget link, 0-48 characters.

ScanQrPopupParams

This object describes the native popup for scanning QR codes.

Field	Type	Description
text	String	Optional. The text to be displayed under the 'Scan QR' heading, 0-64 characters.

PopupParams

This object describes the native popup.

Field	Type	Description
title	String	Optional. The text to be displayed in the popup title, 0-64 characters.
message	String	The message to be displayed in the body of the popup, 1-256 characters.
buttons	Array of PopupButton	Optional. List of buttons to be displayed in the popup, 1-3 buttons. Set to [{“type”:“close”}] by default.

PopupButton

This object describes the native popup button.

Field	Type	Description
id	String	Optional. Identifier of the button, 0-64 characters. Set to empty string by default. If the button is pressed, its id is returned in the callback and the popupClosed event.
type	String	Optional. Type of the button. Set to default by default. Can be one of these values: - default, a button with the default style, - ok, a button with the localized text “OK”, - close, a button with the localized text “Close”, - cancel, a button with the localized text “Cancel”, - destructive, a button with a style that indicates a destructive action (e.g. “Remove”, “Delete”, etc.).
text	String	Optional. The text to be displayed on the button, 0-64 characters. Required if type is default or destructive. Irrelevant for other types.

EmojiStatusParams

This object describes additional settings for setting an emoji status.

Field	Type	Description
duration	Integer	Optional. The duration for which the status will remain set, in seconds.

DownloadFileParams

This object describes the parameters for the file download request.

Note: To ensure consistent file download behavior across platforms, it is recommended to include the HTTP header Content-Disposition: attachment; filename="<file_name>" in the server response. This header helps prompt the download action and suggests a file name for the downloaded file, especially on web platforms where forced downloads cannot always be guaranteed.

Field	Type	Description
url	String	The HTTPS URL of the file to be downloaded.
file_name	String	The suggested name for the downloaded file.

SafeAreaInset

This object represents the system-defined safe area insets, providing padding values to ensure content remains within visible boundaries, avoiding overlap with system UI elements like notches or navigation bars.

Field	Type	Description
top	Integer	The top inset in pixels, representing the space to avoid at the top of the screen. Also available as the CSS variable `var(--tg-safe-area-inset-top)`.
bottom	Integer	The bottom inset in pixels, representing the space to avoid at the bottom of the screen. Also available as the CSS variable `var(--tg-safe-area-inset-bottom)`.
left	Integer	The left inset in pixels, representing the space to avoid on the left side of the screen. Also available as the CSS variable `var(--tg-safe-area-inset-left)`.
right	Integer	The right inset in pixels, representing the space to avoid on the right side of the screen. Also available as the CSS variable `var(--tg-safe-area-inset-right)`.

ContentSafeAreaInset

This object represents the content-defined safe area insets, providing padding values to ensure content remains within visible boundaries, avoiding overlap with Telegram UI elements.

Field	Type	Description
top	Integer	The top inset in pixels, representing the space to avoid at the top of the content area. Also available as the CSS variable `var(--tg-content-safe-area-inset-top)`.
bottom	Integer	The bottom inset in pixels, representing the space to avoid at the bottom of the content area. Also available as the CSS variable `var(--tg-content-safe-area-inset-bottom)`.
left	Integer	The left inset in pixels, representing the space to avoid on the left side of the content area. Also available as the CSS variable `var(--tg-content-safe-area-inset-left)`.
right	Integer	The right inset in pixels, representing the space to avoid on the right side of the content area. Also available as the CSS variable `var(--tg-content-safe-area-inset-right)`.

BackButton

This object controls the back button, which can be displayed in the header of the Mini App in the Telegram interface.

Field	Type	Description
isVisible	Boolean	Shows whether the button is visible. Set to false by default.
onClick(callback)	Function	Bot API 6.1+ A method that sets the button press event handler. An alias for `Telegram.WebApp.onEvent('backButtonClicked', callback)`
offClick(callback)	Function	Bot API 6.1+ A method that removes the button press event handler. An alias for `Telegram.WebApp.offEvent('backButtonClicked', callback)`
show()	Function	Bot API 6.1+ A method to make the button active and visible.
hide()	Function	Bot API 6.1+ A method to hide the button.

All these methods return the BackButton object so they can be chained.

BottomButton

This object controls the button that is displayed at the bottom of the Mini App in the Telegram interface.

Field	Type	Description
type	String	Readonly. Type of the button. It can be either main for the main button or secondary for the secondary button.
text	String	Current button text. Set to Continue for the main button and Cancel for the secondary button by default.
color	String	Current button color. Set to themeParams.button_color for the main button and themeParams.bottom_bar_bg_color for the secondary button by default.
textColor	String	Current button text color. Set to themeParams.button_text_color for the main button and themeParams.button_color for the secondary button by default.
isVisible	Boolean	Shows whether the button is visible. Set to false by default.
isActive	Boolean	Shows whether the button is active. Set to true by default.
hasShineEffect	Boolean	Bot API 7.10+ Shows whether the button has a shine effect. Set to false by default.
position	String	Bot API 7.10+ Position of the secondary button. Not defined for the main button. It applies only if both the main and secondary buttons are visible. Set to left by default. Supported values: - left, displayed to the left of the main button, - right, displayed to the right of the main button, - top, displayed above the main button, - bottom, displayed below the main button.
isProgressVisible	Boolean	Readonly. Shows whether the button is displaying a loading indicator.
setText(text)	Function	A method to set the button text.
onClick(callback)	Function	A method that sets the button's press event handler. An alias for `Telegram.WebApp.onEvent('mainButtonClicked', callback)`
offClick(callback)	Function	A method that removes the button's press event handler. An alias for `Telegram.WebApp.offEvent('mainButtonClicked', callback)`
show()	Function	A method to make the button visible. Note that opening the Mini App from the attachment menu hides the main button until the user interacts with the Mini App interface.
hide()	Function	A method to hide the button.
enable()	Function	A method to enable the button.
disable()	Function	A method to disable the button.
showProgress(leaveActive)	Function	A method to show a loading indicator on the button. It is recommended to display loading progress if the action tied to the button may take a long time. By default, the button is disabled while the action is in progress. If the parameter `leaveActive=true` is passed, the button remains enabled.
hideProgress()	Function	A method to hide the loading indicator.
setParams(params)	Function	A method to set the button parameters. The params parameter is an object containing one or several fields that need to be changed: text - button text; color - button color; text_color - button text color; has_shine_effect - Bot API 7.10+ enable shine effect; position - position of the secondary button; is_active - enable the button; is_visible - show the button.

All these methods return the BottomButton object so they can be chained.

SettingsButton

This object controls the Settings item in the context menu of the Mini App in the Telegram interface.

Field	Type	Description
isVisible	Boolean	Shows whether the context menu item is visible. Set to false by default.
onClick(callback)	Function	Bot API 7.0+ A method that sets the press event handler for the Settings item in the context menu. An alias for `Telegram.WebApp.onEvent('settingsButtonClicked', callback)`
offClick(callback)	Function	Bot API 7.0+ A method that removes the press event handler from the Settings item in the context menu. An alias for `Telegram.WebApp.offEvent('settingsButtonClicked', callback)`
show()	Function	Bot API 7.0+ A method to make the Settings item in the context menu visible.
hide()	Function	Bot API 7.0+ A method to hide the Settings item in the context menu.

All these methods return the SettingsButton object so they can be chained.

HapticFeedback

This object controls haptic feedback.

Field	Type	Description
impactOccurred(style)	Function	Bot API 6.1+ A method tells that an impact occurred. The Telegram app may play the appropriate haptics based on style value passed. Style can be one of these values: - light, indicates a collision between small or lightweight UI objects, - medium, indicates a collision between medium-sized or medium-weight UI objects, - heavy, indicates a collision between large or heavyweight UI objects, - rigid, indicates a collision between hard or inflexible UI objects, - soft, indicates a collision between soft or flexible UI objects.
notificationOccurred(type)	Function	Bot API 6.1+ A method tells that a task or action has succeeded, failed, or produced a warning. The Telegram app may play the appropriate haptics based on type value passed. Type can be one of these values: - error, indicates that a task or action has failed, - success, indicates that a task or action has completed successfully, - warning, indicates that a task or action produced a warning.
selectionChanged()	Function	Bot API 6.1+ A method tells that the user has changed a selection. The Telegram app may play the appropriate haptics. Do not use this feedback when the user makes or confirms a selection; use it only when the selection changes.

All these methods return the HapticFeedback object so they can be chained.

CloudStorage

This object controls the cloud storage. Each bot can store up to 1024 items per user in the cloud storage.

Field	Type	Description
setItem(key, value[, callback])	Function	Bot API 6.9+ A method that stores a value in the cloud storage using the specified key. The key should contain 1-128 characters, only `A-Z`, `a-z`, `0-9`, `_` and `-` are allowed. The value should contain 0-4096 characters. You can store up to 1024 keys in the cloud storage. If an optional callback parameter was passed, the callback function will be called. In case of an error, the first argument will contain the error. In case of success, the first argument will be null and the second argument will be a boolean indicating whether the value was stored.
getItem(key, callback)	Function	Bot API 6.9+ A method that receives a value from the cloud storage using the specified key. The key should contain 1-128 characters, only `A-Z`, `a-z`, `0-9`, `_` and `-` are allowed. In case of an error, the callback function will be called and the first argument will contain the error. In case of success, the first argument will be null and the value will be passed as the second argument.
getItems(keys, callback)	Function	Bot API 6.9+ A method that receives values from the cloud storage using the specified keys. The keys should contain 1-128 characters, only `A-Z`, `a-z`, `0-9`, `_` and `-` are allowed. In case of an error, the callback function will be called and the first argument will contain the error. In case of success, the first argument will be null and the values will be passed as the second argument.
removeItem(key[, callback])	Function	Bot API 6.9+ A method that removes a value from the cloud storage using the specified key. The key should contain 1-128 characters, only `A-Z`, `a-z`, `0-9`, `_` and `-` are allowed. If an optional callback parameter was passed, the callback function will be called. In case of an error, the first argument will contain the error. In case of success, the first argument will be null and the second argument will be a boolean indicating whether the value was removed.
removeItems(keys[, callback])	Function	Bot API 6.9+ A method that removes values from the cloud storage using the specified keys. The keys should contain 1-128 characters, only `A-Z`, `a-z`, `0-9`, `_` and `-` are allowed. If an optional callback parameter was passed, the callback function will be called. In case of an error, the first argument will contain the error. In case of success, the first argument will be null and the second argument will be a boolean indicating whether the values were removed.
getKeys(callback)	Function	Bot API 6.9+ A method that receives the list of all keys stored in the cloud storage. In case of an error, the callback function will be called and the first argument will contain the error. In case of success, the first argument will be null and the list of keys will be passed as the second argument.

All these methods return the CloudStorage object, so they can be chained.

BiometricManager

This object controls biometrics on the device. Before the first use of this object, it needs to be initialized using the init method.

Field	Type	Description
isInited	Boolean	Shows whether biometrics object is initialized.
isBiometricAvailable	Boolean	Shows whether biometrics is available on the current device.
biometricType	String	The type of biometrics currently available on the device. Can be one of these values: - finger, fingerprint-based biometrics, - face, face-based biometrics, - unknown, biometrics of an unknown type.
isAccessRequested	Boolean	Shows whether permission to use biometrics has been requested.
isAccessGranted	Boolean	Shows whether permission to use biometrics has been granted.
isBiometricTokenSaved	Boolean	Shows whether the token is saved in secure storage on the device.
deviceId	String	A unique device identifier that can be used to match the token to the device.
init([callback])	Function	Bot API 7.2+ A method that initializes the BiometricManager object. It should be called before the object's first use. If an optional callback parameter was passed, the callback function will be called when the object is initialized.
requestAccess(params[, callback])	Function	Bot API 7.2+ A method that requests permission to use biometrics according to the params argument of type BiometricRequestAccessParams. If an optional callback parameter was passed, the callback function will be called and the first argument will be a boolean indicating whether the user granted access.
authenticate(params[, callback])	Function	Bot API 7.2+ A method that authenticates the user using biometrics according to the params argument of type BiometricAuthenticateParams. If an optional callback parameter was passed, the callback function will be called and the first argument will be a boolean indicating whether the user authenticated successfully. If so, the second argument will be a biometric token.
updateBiometricToken(token, [callback])	Function	Bot API 7.2+ A method that updates the biometric token in secure storage on the device. To remove the token, pass an empty string. If an optional callback parameter was passed, the callback function will be called and the first argument will be a boolean indicating whether the token was updated.
openSettings()	Function	Bot API 7.2+ A method that opens the biometric access settings for bots. Useful when you need to request biometrics access to users who haven't granted it yet. Note that this method can be called only in response to user interaction with the Mini App interface (e.g. a click inside the Mini App or on the main button)

All these methods return the BiometricManager object so they can be chained.

BiometricRequestAccessParams

This object describes the native popup for requesting permission to use biometrics.

Field	Type	Description
reason	String	Optional. The text to be displayed to a user in the popup describing why the bot needs access to biometrics, 0-128 characters.

BiometricAuthenticateParams

This object describes the native popup for authenticating the user using biometrics.

Field	Type	Description
reason	String	Optional. The text to be displayed to a user in the popup describing why you are asking them to authenticate and what action you will be taking based on that authentication, 0-128 characters.

Accelerometer

This object provides access to accelerometer data on the device.

Field	Type	Description
isStarted	Boolean	Indicates whether accelerometer tracking is currently active.
x	Float	The current acceleration in the X-axis, measured in m/s².
y	Float	The current acceleration in the Y-axis, measured in m/s².
z	Float	The current acceleration in the Z-axis, measured in m/s².
start(params[, callback])	Function	Bot API 8.0+ Starts tracking accelerometer data using params of type AccelerometerStartParams. If an optional callback parameter is provided, the callback function will be called with a boolean indicating whether tracking was successfully started.
stop([callback])	Function	Bot API 8.0+ Stops tracking accelerometer data. If an optional callback parameter is provided, the callback function will be called with a boolean indicating whether tracking was successfully stopped.

All these methods return the Accelerometer object so they can be chained.

AccelerometerStartParams

This object defines the parameters for starting accelerometer tracking.

Field	Type	Description
refresh_rate	Integer	Optional. The refresh rate in milliseconds, with acceptable values ranging from 20 to 1000. Set to 1000 by default. Note that refresh_rate may not be supported on all platforms, so the actual tracking frequency may differ from the specified value.

DeviceOrientation

This object provides access to orientation data on the device.

Field	Type	Description
isStarted	Boolean	Indicates whether device orientation tracking is currently active.
absolute	Boolean	A boolean that indicates whether or not the device is providing orientation data in absolute values.
alpha	Float	The rotation around the Z-axis, measured in radians.
beta	Float	The rotation around the X-axis, measured in radians.
gamma	Float	The rotation around the Y-axis, measured in radians.
start(params[, callback])	Function	Bot API 8.0+ Starts tracking device orientation data using params of type DeviceOrientationStartParams. If an optional callback parameter is provided, the callback function will be called with a boolean indicating whether tracking was successfully started.
stop([callback])	Function	Bot API 8.0+ Stops tracking device orientation data. If an optional callback parameter is provided, the callback function will be called with a boolean indicating whether tracking was successfully stopped.

All these methods return the DeviceOrientation object so they can be chained.

DeviceOrientationStartParams

This object defines the parameters for starting device orientation tracking.

Field	Type	Description
refresh_rate	Integer	Optional. The refresh rate in milliseconds, with acceptable values ranging from 20 to 1000. Set to 1000 by default. Note that refresh_rate may not be supported on all platforms, so the actual tracking frequency may differ from the specified value.
need_absolute	Boolean	Optional. Pass true to receive absolute orientation data, allowing you to determine the device's attitude relative to magnetic north. Use this option if implementing features like a compass in your app. If relative data is sufficient, pass false. Set to false by default. Note: Keep in mind that some devices may not support absolute orientation data. In such cases, you will receive relative data even if need_absolute=true is passed. Check the DeviceOrientation.absolute parameter to determine whether the data provided is absolute or relative.

Gyroscope

This object provides access to gyroscope data on the device.

Field	Type	Description
isStarted	Boolean	Indicates whether gyroscope tracking is currently active.
x	Float	The current rotation rate around the X-axis, measured in rad/s.
y	Float	The current rotation rate around the Y-axis, measured in rad/s.
z	Float	The current rotation rate around the Z-axis, measured in rad/s.
start(params[, callback])	Function	Bot API 8.0+ Starts tracking gyroscope data using params of type GyroscopeStartParams. If an optional callback parameter is provided, the callback function will be called with a boolean indicating whether tracking was successfully started.
stop([callback])	Function	Bot API 8.0+ Stops tracking gyroscope data. If an optional callback parameter is provided, the callback function will be called with a boolean indicating whether tracking was successfully stopped.

All these methods return the Gyroscope object so they can be chained.

GyroscopeStartParams

This object defines the parameters for starting gyroscope tracking.

Field	Type	Description
refresh_rate	Integer	Optional. The refresh rate in milliseconds, with acceptable values ranging from 20 to 1000. Set to 1000 by default. Note that refresh_rate may not be supported on all platforms, so the actual tracking frequency may differ from the specified value.

LocationManager

This object controls location access on the device. Before the first use of this object, it needs to be initialized using the init method.

Field	Type	Description
isInited	Boolean	Shows whether the LocationManager object has been initialized.
isLocationAvailable	Boolean	Shows whether location services are available on the current device.
isAccessRequested	Boolean	Shows whether permission to use location has been requested.
isAccessGranted	Boolean	Shows whether permission to use location has been granted.
init([callback])	Function	Bot API 8.0+ A method that initializes the LocationManager object. It should be called before the object's first use. If an optional callback parameter is provided, the callback function will be called when the object is initialized.
getLocation(callback)	Function	Bot API 8.0+ A method that requests location data. The callback function will be called with null as the first argument if access to location was not granted, or an object of type LocationData as the first argument if access was successful.
openSettings()	Function	Bot API 8.0+ A method that opens the location access settings for bots. Useful when you need to request location access from users who haven't granted it yet. Note that this method can be called only in response to user interaction with the Mini App interface (e.g., a click inside the Mini App or on the main button).

All these methods return the LocationManager object so they can be chained.

LocationData

This object contains data about the current location.

Field	Type	Description
latitude	Float	Latitude in degrees.
longitude	Float	Longitude in degrees.
altitude	Float	Altitude above sea level in meters. null if altitude data is not available on the device.
course	Float	The direction the device is moving in degrees (0 = North, 90 = East, 180 = South, 270 = West). null if course data is not available on the device.
speed	Float	The speed of the device in m/s. null if speed data is not available on the device.
horizontal_accuracy	Float	Accuracy of the latitude and longitude values in meters. null if horizontal accuracy data is not available on the device.
vertical_accuracy	Float	Accuracy of the altitude value in meters. null if vertical accuracy data is not available on the device.
course_accuracy	Float	Accuracy of the course value in degrees. null if course accuracy data is not available on the device.
speed_accuracy	Float	Accuracy of the speed value in m/s. null if speed accuracy data is not available on the device.

WebAppInitData

This object contains data that is transferred to the Mini App when it is opened. It is empty if the Mini App was launched from a keyboard button or from inline mode.

Field	Type	Description
query_id	String	Optional. A unique identifier for the Mini App session, required for sending messages via the answerWebAppQuery method.
user	WebAppUser	Optional. An object containing data about the current user.
receiver	WebAppUser	Optional. An object containing data about the chat partner of the current user in the chat where the bot was launched via the attachment menu. Returned only for private chats and only for Mini Apps launched via the attachment menu.
chat	WebAppChat	Optional. An object containing data about the chat where the bot was launched via the attachment menu. Returned for supergroups, channels and group chats – only for Mini Apps launched via the attachment menu.
chat_type	String	Optional. Type of the chat from which the Mini App was opened. Can be either “sender” for a private chat with the user opening the link, “private”, “group”, “supergroup”, or “channel”. Returned only for Mini Apps launched from direct links.
chat_instance	String	Optional. Global identifier, uniquely corresponding to the chat from which the Mini App was opened. Returned only for Mini Apps launched from a direct link.
start_param	String	Optional. The value of the startattach parameter, passed via link. Only returned for Mini Apps when launched from the attachment menu via link. The value of the `start_param` parameter will also be passed in the GET-parameter `tgWebAppStartParam`, so the Mini App can load the correct interface right away.
can_send_after	Integer	Optional. Time in seconds, after which a message can be sent via the answerWebAppQuery method.
auth_date	Integer	Unix time when the form was opened.
hash	String	A hash of all passed parameters, which the bot server can use to check their validity.
signature ^NEW	String	A signature of all passed parameters (except hash), which the third party can use to check their validity.

WebAppUser

This object contains the data of the Mini App user.

Field	Type	Description
id	Integer	A unique identifier for the user or bot. This number may have more than 32 significant bits and some programming languages may have difficulty/silent defects in interpreting it. It has at most 52 significant bits, so a 64-bit integer or a double-precision float type is safe for storing this identifier.
is_bot	Boolean	Optional. True, if this user is a bot. Returns in the receiver field only.
first_name	String	First name of the user or bot.
last_name	String	Optional. Last name of the user or bot.
username	String	Optional. Username of the user or bot.
language_code	String	Optional. IETF language tag of the user's language. Returns in user field only.
is_premium	True	Optional. True, if this user is a Telegram Premium user.
added_to_attachment_menu	True	Optional. True, if this user added the bot to the attachment menu.
allows_write_to_pm	True	Optional. True, if this user allowed the bot to message them.
photo_url	String	Optional. URL of the user’s profile photo. The photo can be in .jpeg or .svg formats.

WebAppChat

This object represents a chat.

Field	Type	Description
id	Integer	Unique identifier for this chat. This number may have more than 32 significant bits and some programming languages may have difficulty/silent defects in interpreting it. But it has at most 52 significant bits, so a signed 64-bit integer or double-precision float type are safe for storing this identifier.
type	String	Type of chat, can be either “group”, “supergroup” or “channel”
title	String	Title of the chat
username	String	Optional. Username of the chat
photo_url	String	Optional. URL of the chat’s photo. The photo can be in .jpeg or .svg formats. Only returned for Mini Apps launched from the attachment menu.

Validating data received via the Mini App

To validate data received via the Mini App, one should send the data from the Telegram.WebApp.initData field to the bot's backend. The data is a query string, which is composed of a series of field-value pairs.

You can verify the integrity of the data received by comparing the received hash parameter with the hexadecimal representation of the HMAC-SHA-256 signature of the data-check-string with the secret key, which is the HMAC-SHA-256 signature of the bot's token with the constant string WebAppData used as a key.

Data-check-string is a chain of all received fields, sorted alphabetically, in the format key=<value> with a line feed character ('\n', 0x0A) used as separator – e.g., 'auth_date=<auth_date>\nquery_id=<query_id>\nuser=<user>'.

The full check might look like:

data_check_string = ...
secret_key = HMAC_SHA256(<bot_token>, "WebAppData")
if (hex(HMAC_SHA256(data_check_string, secret_key)) == hash) {
  // data is from Telegram
}

To prevent the use of outdated data, you can additionally check the auth_date field, which contains a Unix timestamp of when it was received by the Mini App.

Once validated, the data may be used on your server. Complex data types are represented as JSON-serialized objects.

Validating data for Third-Party Use

^NEW If you need to share the data with a third party, they can validate the data without requiring access to your bot's token. Simply provide them with the data from the Telegram.WebApp.initData field and your bot_id.

The integrity of the data can be verified by validating the received signature parameter, which is the base64url-encoded representation of the Ed25519 signature of the data-check-string. The verification is performed using the public key provided by Telegram.

Data-check-string is constructed as follows:
1. Prepend the bot_id, followed by : and the constant string WebAppData.
2. Add a line feed character ('\n', 0x0A).
3. Append all received fields (except hash and signature), sorted alphabetically, in the format key=<value>.
4. Separate each key-value pair with a line feed character ('\n', 0x0A).

Example:
'12345678:WebAppData\nauth_date=<auth_date>\nquery_id=<query_id>\nuser=<user>'

The verification process might look like this:

data_check_string = ...
public_key = "<Telegram_public_key>"
if (Ed25519_verify(public_key, data_check_string, signature)) {
  // data is valid and originated from Telegram
}

Telegram provides the following Ed25519 public keys for signature verification:

Test environment: 40055058a4ee38156a06562e52eece92a771bcd8346a8c4615cb7376eddf72ec (hex)
Production: e7bf03a2fa4602af4580703d88dda5bb59f32ed8b02a56c187fe7d34caed242d (hex)

To prevent the use of outdated data, the third party should additionally validate the auth_date field. This field contains a Unix timestamp indicating when the data was received by the Mini App.

Once validated, the data may be used. Complex data types are represented as JSON-serialized objects.

Events Available for Mini Apps

The Mini App can receive events from the Telegram app, onto which a handler can be attached using the Telegram.WebApp.onEvent(eventType, eventHandler) method. Inside eventHandler the this object refers to Telegram.WebApp, the set of parameters sent to the handler depends on the event type. Below is a list of possible events:

eventType	Description
`activated` ^NEW	Bot API 8.0+ Occurs when the Mini App becomes active (e.g., opened from minimized state or selected among tabs). eventHandler receives no parameters.
`deactivated` ^NEW	Bot API 8.0+ Occurs when the Mini App becomes inactive (e.g., minimized or moved to an inactive tab). eventHandler receives no parameters.
`themeChanged`	Occurs whenever theme settings are changed in the user's Telegram app (including switching to night mode). eventHandler receives no parameters, new theme settings and color scheme can be received via this.themeParams and this.colorScheme respectively.
`viewportChanged`	Occurs when the visible section of the Mini App is changed. eventHandler receives an object with the single field isStateStable. If isStateStable is true, the resizing of the Mini App is finished. If it is false, the resizing is ongoing (the user is expanding or collapsing the Mini App or an animated object is playing). The current value of the visible section’s height is available in this.viewportHeight.
`safeAreaChanged` ^NEW	Bot API 8.0+ Occurs when the device's safe area insets change (e.g., due to orientation change or screen adjustments). eventHandler receives no parameters. The current inset values can be accessed via this.safeAreaInset.
`contentSafeAreaChanged` ^NEW	Bot API 8.0+ Occurs when the safe area for content changes (e.g., due to orientation change or screen adjustments). eventHandler receives no parameters. The current inset values can be accessed via this.contentSafeAreaInset.
`mainButtonClicked`	Occurs when the main button is pressed. eventHandler receives no parameters.
`secondaryButtonClicked`	Bot API 7.10+ Occurs when the secondary button is pressed. eventHandler receives no parameters.
`backButtonClicked`	Bot API 6.1+ Occurrs when the back button is pressed. eventHandler receives no parameters.
`settingsButtonClicked`	Bot API 6.1+ Occurrs when the Settings item in context menu is pressed. eventHandler receives no parameters.
`invoiceClosed`	Bot API 6.1+ Occurrs when the opened invoice is closed. eventHandler receives an object with the two fields: url – invoice link provided and status – one of the invoice statuses: - paid – invoice was paid successfully, - cancelled – user closed this invoice without paying, - failed – user tried to pay, but the payment was failed, - pending – the payment is still processing. The bot will receive a service message about a successful payment when the payment is successfully paid.
`popupClosed`	Bot API 6.2+ Occurrs when the opened popup is closed. eventHandler receives an object with the single field button_id – the value of the field id of the pressed button. If no buttons were pressed, the field button_id will be null.
`qrTextReceived`	Bot API 6.4+ Occurs when the QR code scanner catches a code with text data. eventHandler receives an object with the single field data containing text data from the QR code.
`scanQrPopupClosed`	Bot API 7.7+ Occurs when the QR code scanner popup is closed by the user. eventHandler receives no parameters.
`clipboardTextReceived`	Bot API 6.4+ Occurrs when the `readTextFromClipboard` method is called. eventHandler receives an object with the single field data containing text data from the clipboard. If the clipboard contains non-text data, the field data will be an empty string. If the Mini App has no access to the clipboard, the field data will be null.
`writeAccessRequested`	Bot API 6.9+ Occurs when the write permission was requested. eventHandler receives an object with the single field status containing one of the statuses: - allowed – user granted write permission to the bot, - cancelled – user declined this request.
`contactRequested`	Bot API 6.9+ Occurrs when the user's phone number was requested. eventHandler receives an object with the single field status containing one of the statuses: - sent – user shared their phone number with the bot, - cancelled – user declined this request.
`biometricManagerUpdated`	Bot API 7.2+ Occurs whenever BiometricManager object is changed. eventHandler receives no parameters.
`biometricAuthRequested`	Bot API 7.2+ Occurs whenever biometric authentication was requested. eventHandler receives an object with the field isAuthenticated containing a boolean indicating whether the user was authenticated successfully. If isAuthenticated is true, the field biometricToken will contain the biometric token stored in secure storage on the device.
`biometricTokenUpdated`	Bot API 7.2+ Occurs whenever the biometric token was updated. eventHandler receives an object with the single field isUpdated, containing a boolean indicating whether the token was updated.
`fullscreenChanged` ^NEW	Bot API 8.0+ Occurs whenever the Mini App enters or exits fullscreen mode. eventHandler receives no parameters. The current fullscreen state can be checked via this.isFullscreen.
`fullscreenFailed` ^NEW	Bot API 8.0+ Occurs if a request to enter fullscreen mode fails. eventHandler receives an object with the single field error, describing the reason for the failure. Possible values for error are: UNSUPPORTED – Fullscreen mode is not supported on this device or platform. ALREADY_FULLSCREEN – The Mini App is already in fullscreen mode.
`homeScreenAdded` ^NEW	Bot API 8.0+ Occurs when the Mini App is successfully added to the home screen. eventHandler receives no parameters.
`homeScreenChecked` ^NEW	Bot API 8.0+ Occurs after checking the home screen status. eventHandler receives an object with the field status, which is a string indicating the current home screen status. Possible values for status are: - unsupported – the feature is not supported, and it is not possible to add the icon to the home screen, - unknown – the feature is supported, and the icon can be added, but it is not possible to determine if the icon has already been added, - added – the icon has already been added to the home screen, - missed – the icon has not been added to the home screen.
`accelerometerStarted` ^NEW	Bot API 8.0+ Occurs when accelerometer tracking has started successfully. eventHandler receives no parameters.
`accelerometerStopped` ^NEW	Bot API 8.0+ Occurs when accelerometer tracking has stopped. eventHandler receives no parameters.
`accelerometerChanged` ^NEW	Bot API 8.0+ Occurs with the specified frequency after calling the `start` method, sending the current accelerometer data. eventHandler receives no parameters, the current acceleration values can be received via this.x, this.y and this.z respectively.
`accelerometerFailed` ^NEW	Bot API 8.0+ Occurs if a request to start accelerometer tracking fails. eventHandler receives an object with the single field error, describing the reason for the failure. Possible values for error are: UNSUPPORTED – Accelerometer tracking is not supported on this device or platform.
`deviceOrientationStarted` ^NEW	Bot API 8.0+ Occurs when device orientation tracking has started successfully. eventHandler receives no parameters.
`deviceOrientationStopped` ^NEW	Bot API 8.0+ Occurs when device orientation tracking has stopped. eventHandler receives no parameters.
`deviceOrientationChanged` ^NEW	Bot API 8.0+ Occurs with the specified frequency after calling the `start` method, sending the current orientation data. eventHandler receives no parameters, the current device orientation values can be received via this.alpha, this.beta and this.gamma respectively.
`deviceOrientationFailed` ^NEW	Bot API 8.0+ Occurs if a request to start device orientation tracking fails. eventHandler receives an object with the single field error, describing the reason for the failure. Possible values for error are: UNSUPPORTED – Device orientation tracking is not supported on this device or platform.
`gyroscopeStarted` ^NEW	Bot API 8.0+ Occurs when gyroscope tracking has started successfully. eventHandler receives no parameters.
`gyroscopeStopped` ^NEW	Bot API 8.0+ Occurs when gyroscope tracking has stopped. eventHandler receives no parameters.
`gyroscopeChanged` ^NEW	Bot API 8.0+ Occurs with the specified frequency after calling the `start` method, sending the current gyroscope data. eventHandler receives no parameters, the current rotation rates can be received via this.x, this.y and this.z respectively.
`gyroscopeFailed` ^NEW	Bot API 8.0+ Occurs if a request to start gyroscope tracking fails. eventHandler receives an object with the single field error, describing the reason for the failure. Possible values for error are: UNSUPPORTED – Gyroscope tracking is not supported on this device or platform.
`locationManagerUpdated` ^NEW	Bot API 8.0+ Occurs whenever LocationManager object is changed. eventHandler receives no parameters.
`locationRequested` ^NEW	Bot API 8.0+ Occurs when location data is requested. eventHandler receives an object with the single field locationData of type LocationData, containing the current location information.
`shareMessageSent` ^NEW	Bot API 8.0+ Occurs when the message is successfully shared by the user. eventHandler receives no parameters.
`shareMessageFailed` ^NEW	Bot API 8.0+ Occurs if sharing the message fails. eventHandler receives an object with the single field error, describing the reason for the failure. Possible values for error are: UNSUPPORTED – The feature is not supported by the client. MESSAGE_EXPIRED – The message could not be retrieved because it has expired. MESSAGE_SEND_FAILED – An error occurred while attempting to send the message. USER_DECLINED – The user closed the dialog without sharing the message. UNKNOWN_ERROR – An unknown error occurred.
`emojiStatusSet` ^NEW	Bot API 8.0+ Occurs when the emoji status is successfully set. eventHandler receives no parameters.
`emojiStatusFailed` ^NEW	Bot API 8.0+ Occurs if setting the emoji status fails. eventHandler receives an object with the single field error, describing the reason for the failure. Possible values for error are: UNSUPPORTED – The feature is not supported by the client. SUGGESTED_EMOJI_INVALID – One or more emoji identifiers are invalid. DURATION_INVALID – The specified duration is invalid. USER_DECLINED – The user closed the dialog without setting a status. SERVER_ERROR – A server error occurred when attempting to set the status. UNKNOWN_ERROR – An unknown error occurred.
`emojiStatusAccessRequested` ^NEW	Bot API 8.0+ Occurs when the write permission was requested. eventHandler receives an object with the single field status containing one of the statuses: - allowed – user granted emoji status permission to the bot, - cancelled – user declined this request.
`fileDownloadRequested` ^NEW	Bot API 8.0+ Occurs when the user responds to the file download request. eventHandler receives an object with the single field status containing one of the statuses: - downloading – the file download has started, - cancelled – user declined this request.

Adding Bots to the Attachment Menu

Attachment menu integration is currently only available for major advertisers on the Telegram Ad Platform. However, all bots can use it in the test server environment. Talk to Botfather on the test server to set up the integration.

A special link is used to add bots to the attachment menu:

https://t.me/botusername?startattach
or
https://t.me/botusername?startattach=command

For example, open this attachment menu link for @DurgerKingBot, then use the menu in any private chat.

Opening the link prompts the user to add the bot to their attachment menu. If the bot has already been added, the attachment menu will open in the current chat and redirect to the bot there (if the link is opened from a 1-on-1 chat). If a non-empty startattach parameter was included in the link, it will be passed to the Mini App in the start_param field and in the GET parameter tgWebAppStartParam.

The following link formats are also supported:

https://t.me/username?attach=botusername
https://t.me/username?attach=botusername&startattach=command
https://t.me/+1234567890?attach=botusername
https://t.me/+1234567890?attach=botusername&startattach=command

These links open the Mini App in the attachment menu in the chat with a specific user. If the bot wasn't already added to the attachment menu, the user will be prompted to do so. If a non-empty startattach parameter was included in the link, it will be passed to the Mini App in the start_param field and in the GET parameter tgWebAppStartParam.

Bot API 6.1+ supports a new link format:

https://t.me/botusername?startattach&choose=users+bots
https://t.me/botusername?startattach=command&choose=groups+channels

Opening such a link prompts the user to choose a specific chat and opens the attachment menu in that chat. If the bot wasn't already added to the attachment menu, the user will be prompted to do so. You can specify which types of chats the user will be able to choose from. It can be one or more of the following types: users, bots, groups, channels separated by a + sign. If a non-empty startattach parameter was included in the link, it will be passed to the Mini App in the start_param field and in the GET parameter tgWebAppStartParam.

Additional Data in User-Agent

When the Mini App is running on Android, additional information is appended to the User-Agent string to provide more context about the app environment. This information includes the app version, device model, Android version, SDK version, and device performance class, formatted as follows:

Telegram-Android/{app_version} ({manufacturer} {model}; Android {android_version}; SDK {sdk_version}; {performance_class})

where:

{app_version} is the version of the Telegram app (e.g., 11.3.3),
{manufacturer} {model} represents the device’s manufacturer and model (e.g., Google sdk_gphone64_arm64),
{android_version} is the Android OS version running on the device (e.g., 14),
{sdk_version} indicates the Android SDK version (e.g., 34),
{performance_class} specifies the device performance class as LOW, AVERAGE, or HIGH, indicating the device's performance capacity.

Example
Mozilla/5.0 (Linux; Android 14; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/113.0.5672.136 Mobile Safari/537.36 Telegram-Android/11.3.3 (Google sdk_gphone64_arm64; Android 14; SDK 34; LOW)

We recommend using this information to optimize your Mini App based on the device's capabilities. For instance, you can adjust animations and visual effects in games on low-performance devices to ensure a smooth experience for all users, regardless of device specifications.

Testing Mini Apps

Using bots in the test environment

To log in to the test environment, use either of the following:

iOS: tap 10 times on the Settings icon > Accounts > Login to another account > Test.
Telegram Desktop: open ☰ Settings > Shift + Alt + Right click ‘Add Account’ and select ‘Test Server’.
macOS: click the Settings icon 10 times to open the Debug Menu, ⌘ + click ‘Add Account’ and log in via phone number.

The test environment is completely separate from the main environment, so you will need to create a new user account and a new bot with @BotFather.

After receiving your bot token, you can send requests to the Bot API in this format:

https://api.telegram.org/bot<token>/test/METHOD_NAME

Note: When working with the test environment, you may use HTTP links without TLS to test your Mini App.

Debug Mode for Mini Apps

Use these tools to find app-specific issues in your Mini App:

iOS

In Telegram tap 10 times on the Settings icon and toggle on Allow Web View Inspection.
Connect your phone to your computer using a USB cable.
Open Safari on your Mac, then go to Develop > [Your Device Name] in the menu bar.
Launch your Mini App on the iOS device – it will appear in the Develop menu under your device.

Android

Enable USB-Debugging on your device.
In Telegram Settings, scroll all the way down, press and hold on the version number two times.
Choose Enable WebView Debug in the Debug Settings.
Connect your phone to your computer and open chrome://inspect/#devices in Chrome – you will see your Mini App there when you launch it on your phone.

Telegram Desktop on Windows and Linux

Download and launch the Beta Version of Telegram Desktop on Windows or Linux (not supported on Telegram Desktop for macOS yet).
Go to Settings > Advanced > Experimental settings > Enable webview inspection.
Right click in the WebView and choose Inspect.

Telegram macOS

Download and launch the Beta Version of Telegram macOS.
Quickly click 5 times on the Settings icon to open the debug menu and enable “Debug Mini Apps”.
Right click in the Mini App and choose Inspect Element.

Telegram is a cloud-based mobile and desktop messaging app with a focus on security and speed.