Telegram Triggers

These trigger blocks let your agent receive incoming messages and reactions from Telegram in real time via webhooks. When a user sends a message or reacts to one, the trigger fires and outputs structured data (chat ID, user info, message content, file IDs) that downstream blocks can process.

Telegram Message Reaction Trigger

What it is

Triggers when a reaction to a message is changed. Works in private chats automatically. In groups, the bot must be an administrator.

How it works

This block uses the Telegram Bot API webhook system, subscribing to message_reaction updates. When a user adds, changes, or removes a reaction on a message in a chat with your bot, Telegram sends an update to the registered webhook URL. The block extracts the chat ID, message ID, reacting user's info, and both the old and new reaction lists. In private chats this works automatically; in group chats the bot must be an administrator to receive reaction updates.

Outputs

Output	Description	Type
error	Error message if the operation failed	str
payload	The complete webhook payload from Telegram	Dict[str, Any]
chat_id	The chat ID where the reaction occurred	int
message_id	The message ID that was reacted to	int
user_id	The user ID who changed the reaction	int
username	Username of the user (may be empty)	str
new_reactions	List of new reactions on the message	List[Any]
old_reactions	List of previous reactions on the message	List[Any]

Possible use case

Sentiment tracking — Monitor reactions on bot-posted announcements to gauge audience sentiment in real time.

Approval workflows — Use a thumbs-up reaction as a lightweight approval signal to trigger downstream actions like deployments or task assignments.

Engagement analytics — Aggregate reaction data across messages to identify which content resonates most with your audience.

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Telegram Message Trigger

What it is

Triggers when a message is received or edited in your Telegram bot. Supports text, photos, voice messages, audio files, documents, and videos.

How it works

This block registers a webhook with the Telegram Bot API that subscribes to message and edited_message updates. Incoming messages are routed by content type — text, photo, voice, audio, document, or video — based on the event filter you configure. When a matching message arrives, the block extracts common fields (chat ID, sender info, message ID) along with type-specific data such as the text content, file IDs for media, or captions. File IDs can be passed to the Get Telegram File block to download the actual media. If the "edited_message" event is enabled, the block also fires when a user edits a previously sent message, with the is_edited output set to true.

Inputs

Input	Description	Type	Required
events	Types of messages to receive	Message Types	Yes

Outputs

Output	Description	Type
error	Error message if the operation failed	str
payload	The complete webhook payload from Telegram	Dict[str, Any]
chat_id	The chat ID where the message was received. Use this to send replies.	int
message_id	The unique message ID	int
user_id	The user ID who sent the message	int
username	Username of the sender (may be empty)	str
first_name	First name of the sender	str
event	The message type (text, photo, voice, audio, etc.)	str
text	Text content of the message (for text messages)	str
photo_file_id	File ID of the photo (for photo messages). Use GetTelegramFileBlock to download.	str
voice_file_id	File ID of the voice message (for voice messages). Use GetTelegramFileBlock to download.	str
audio_file_id	File ID of the audio file (for audio messages). Use GetTelegramFileBlock to download.	str
file_id	File ID for document/video messages. Use GetTelegramFileBlock to download.	str
file_name	Original filename (for document/audio messages)	str
caption	Caption for media messages	str
is_edited	Whether this is an edit of a previously sent message	bool

Possible use case

Conversational AI bot — Receive text messages from users and feed them into an AI agent that generates and sends replies.

Photo processing pipeline — Trigger on incoming photos, download them with Get Telegram File, run image analysis or OCR, and reply with the results.

Voice message transcription — Capture voice messages, download the audio file, pass it to a speech-to-text service, and send the transcript back to the user.

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