Intercom API returning "User Not Found" when trying to send message via HTTP Request

Help me Build my Workflow
1

Hi everyone,

I’m building an AI chat agent that responds to Intercom messages through n8n. Everything works except the final step - sending the response back to Intercom.

My workflow:

  1. Webhook receives Intercom message :white_check_mark:
  2. Process data and generate AI response :white_check_mark:
  3. Extract userId and conversationId :white_check_mark:
  4. Send response back to Intercom :cross_mark: (User Not Found error)

What I’ve tried:

  • Reply API: https://api.intercom.io/conversations/{id}/reply
  • Messages API: https://api.intercom.io/messages
  • Added 30-second wait node (for new contact delay)
  • Verified all IDs are correct
  • Using proper authentication (Intercom API credential)

Error: 404 “User Not Found” despite having valid user ID from webhook

Current HTTP Request config:

{
“type”: “admin”,
“admin_id”: “8498050”,
“message_type”: “comment”,
“body”: “{{ $(‘AI Agent’).first().json.output }}”
}

Has anyone successfully implemented Intercom message sending via n8n? What am I missing?

Using: n8n cloud, Intercom Advanced plan

Thanks!

2

Hey @NEKRETNINE_OBRADOVIC

Could you share exactly what you set for each endpoint? Did you mix up between conversations IDs and user IDs? :slight_smile:

You can compare with the documentation.

Let me know!