Description
Trigger the workflow when someone messages your Telegram bot (official Bot API). One run per update with a fully normalized payload: chatId and userId, username and name, text or caption, media file_id references (photo at max resolution, document, voice, video, sticker), location, reply context, and inline-button clicks (callback_query) extracted as interactive {id, title}. Create the bot in 2 minutes with @BotFather — no business verification, no cost, no pre-approved templates: the fastest channel for a conversational bot or a live demo. Fail-closed security: every POST is accepted only when the X-Telegram-Bot-Api-Secret-Token header matches your configured secret (timing-safe). Automatic per-update_id dedup. Pair with the Telegram send node for a full bot: reply to the received chatId.
