Here's a TLDR bullet list for integrating with n8n:

Authentication Setup

• Method: Bearer Token
• Header: Authorization: Bearer YOUR_SESSION_TOKEN
• Location: n8n HTTP Request node → Headers tab

API Endpoint Details

• URL: https://api.inline.chat/v1/sendMessage20250509
• Method: POST
• Content-Type: application/json

Request Body Structure

{
  "peerUserId": "123",        // OR use peerThreadId
  "peerThreadId": "456",      // OR use peerUserId
  "text": "Your message here",
}

n8n Configuration Steps

1. Add HTTP Request node to your workflow
2. Set Method: POST
3. Set URL: https://api.inline.chat/v1/sendMessage20250509
4. Add Headers:
   • Content-Type: application/json
   • Authorization: Bearer YOUR_TOKEN
5. Add Body (JSON):
   • Use n8n's JSON editor or expressions
   • Reference previous node data with {{ $json.fieldName }}

Key Requirements

• ✅ Must provide either peerUserId OR peerThreadId (not both)
• ✅ Must provide either text OR photoId (or both)