Telegram Bot Developers
Debug every Telegram bot updatefrom setWebhook to production
The Telegram Bot API only delivers updates to a public HTTPS URL, so localhost bots stay blind. Hooklistener captures every update, tunnels them to your machine, and even pings you on Telegram when webhooks arrive.
Make sense of Telegram's webhook-first Bot API
Telegram pushes every message, callback_query, and inline_query to the single URL you register with setWebhook, and that URL must be public HTTPS with a valid certificate. When delivery fails, Telegram retries quietly while pending_update_count climbs and getWebhookInfo only shows the last error.
Point setWebhook at a Hooklistener endpoint to see exactly what Telegram sends: full update payloads, the X-Telegram-Bot-Api-Secret-Token header, and delivery timing. Then tunnel updates to localhost or replay them until your handler is solid.
Why Telegram webhooks break
Localhost is unreachable
setWebhook rejects anything that isn't public HTTPS, so you can't point a bot at your dev machine. Hooklistener CLI tunnels give you a persistent your-slug.hook.events URL that forwards live updates straight to localhost.
Silent delivery failures
Telegram retries failed deliveries without telling you, and getWebhookInfo only surfaces the last error message. Hooklistener logs every request so you see exactly when and why updates stopped flowing.
Mystery payload shapes
A message update looks nothing like a callback_query or pre_checkout_query. Capture real updates of every type and inspect prettified JSON instead of guessing from the docs.
The Hooklistener workflow for Telegram bots
Capture and replay updates
Register a Hooklistener endpoint with setWebhook and record every update with headers, body, and timing. Replay any update against your handler while you iterate, without re-sending messages to the bot.
CLI tunnels for local dev
Forward live updates to your machine over an outbound WebSocket that works behind firewalls. The Tunnel Traffic Inspector streams each request in real time with method, path, status, and duration.
Telegram notifications built in
Flip the integration around: connect a Telegram chat to any debug endpoint and the Hooklistener bot messages you with method, path, timestamp, and a body preview every time a webhook arrives.
Telegram bot flows worth instrumenting
Command and conversation handlers
Capture real message updates to verify entities, chat IDs, and reply logic before your bot answers users in production.
Inline keyboards and callbacks
Debug callback_query payloads from inline buttons and confirm you answer them fast enough to clear the loading spinner.
Channels, groups, and payments
Inspect channel_post, chat_member, and pre_checkout_query updates so moderation tools and payment flows never miss an event.
Frequently asked questions
Why is my Telegram webhook not working?
Start with getWebhookInfo: check last_error_message, last_error_date, and pending_update_count. Common culprits are invalid certificates, non-HTTPS URLs, unsupported ports (Telegram only delivers to 443, 80, 88, and 8443), and handlers that respond too slowly. Point setWebhook at a Hooklistener endpoint to confirm whether Telegram is delivering at all.
How do I test a Telegram bot webhook locally?
Telegram can't reach localhost, so you need a tunnel. The Hooklistener CLI gives you a persistent HTTPS subdomain (your-slug.hook.events) that setWebhook accepts, with device-code login and an outbound WebSocket connection that works behind firewalls. No inbound ports required.
Does Hooklistener show the Telegram secret token?
Yes. If you set secret_token in setWebhook, Telegram sends it as the X-Telegram-Bot-Api-Secret-Token header on every update. Hooklistener captures all headers so you can verify the token arrives and your validation logic matches it.
Can Hooklistener send me Telegram notifications?
Yes. On paid plans, connect a Telegram chat to any debug endpoint from its Integrations panel by entering a chat ID. The Hooklistener bot then sends a formatted message for each incoming webhook with the HTTP method, path, timestamp, and a body preview up to 500 characters, plus a Test button to verify the connection.
Stop flying blind on Telegram updates
Capture every update, tunnel them to localhost, and replay the tricky ones until your bot handles them all. Free to start, no credit card required.