Trying to make a basic telegram integration - error with webhook

[Rux]

Hi there!
I’m trying to make a simple telegram integration:

• I send a message to my telegram bot
• I receive the message
• the AI agent replies.

However I cannot make the telegram Node work - as I always get this error:
“Bad Request: bad webhook: Failed to resolve host: Name or service not known”

These are the webhook URLs for test & Prod in my telegram Node:

Test:
https://n8n.example.com/webhook-test/cc8708f1-ca2d-492e-a84c-46b37a830d4f/webhook

Prod:
https://n8n.example.com/webhook/cc8708f1-ca2d-492e-a84c-46b37a830d4f/webhook

Im self hosting. I tried playing with the vars, but it says thats a Paid Plan feature.

Is there any way I can work around this?

thanks!!!

[BuddiesD]

Hi
Are you actually using n8n.example.com, or is that just a placeholder?

if ur using it that’s likely why Telegram throws the “Failed to resolve host” error

Because n8n.example.com isn’t a real, reachable domain

[Rux]

thanks @BuddiesD
that was precisely the error, but I didn’t know how to change the URL.
I fixed it now.

Turns out if you are self hosting - you have to set the WEBHOOK_URL environment variable in your Docker configuration (if running n8n on Docker)

1. in your docker-compose.yml file: replace this env variable with your domain
   WEBHOOK_URL=https://your.actual-domain.com

2. recreate your n8n container (docker-compose down → “up -d”)