WhatsApp/Telegram Car Listing Automation with n8n Webhook API

Turn WhatsApp/Telegram car chats into confirmed listings—automatically

This n8n workflow listens to seller messages from WhatsApp, Telegram, or a generic webhook, then converts car details into drafts and confirmed car listings by calling your external Listing API (and optional Config API). Sellers manage the process with simple chat commands—until they send “YES” to publish.

What this workflow does

• Receives inbound POST webhooks from WhatsApp/Telegram (or a generic chat integration) and normalizes sender + message text.
• Derives a seller ID, loads seller settings from n8n static data, and optionally fetches extra configuration via the Config API.
• Supports internal settings actions (e.g., get/put/notify) to update stored settings and optionally prepare a seller notification message.
• Handles seller commands such as HELP, AI ON/OFF, COUNTRY, QUIET, MY CARS, SELECT, PHOTO, PAYLINK, and STATS—updating settings and, when needed, calling the Listing API to fetch listings or attach a photo.
• Extracts car fields from free text, requests missing required details, or saves a draft for confirmation.
• Publishes on confirmation: when the seller sends “YES”, the workflow loads the saved draft and publishes it by sending it to the Listing API.
• Responds with next steps as JSON, and for notifications, also forwards messages to an outbound send webhook.

Use cases

• Sellers describe cars in WhatsApp/Telegram; the workflow builds a listing draft and asks only for missing fields.
• A chat-based “My Cars” + “SELECT” flow that helps sellers manage their existing listings.
• Command-driven automation for photo attachment and listing stats—without leaving the messaging app.

Technical details

• n8n nodes: webhook, if, code, http request, respond to webhook (plus a sticky note).
• Environment variables for external APIs:
  • LISTING_API_BASE / SEARCH_API_BASE
  • LISTING_API_KEY