OpenClaw N8n Facebook Poster

A Zalo bot plugin for OpenClaw that collects posts and images from Zalo messages and sends them to an n8n webhook for publishing to Facebook and Threads.

Features

• Interactive Drafting: Start a draft via slash command, send messages/images, and send them all at once.
• Image Handling: Automatically downloads Zalo CDN images and re-uploads them to Telegraph to bypass authentication/hotlinking issues, providing public URLs to n8n.
• Agent Integration: Provides the create_facebook_post tool for LLMs to construct posts automatically.
• Local Persistence: Saves post contents locally before sending to ensure no data loss.

Installation

Install via ClawHub:

openclaw plugins install clawhub:openclaw-n8n-facebook-poster

Configuration

In your openclaw.json, enable the plugin:

{
  "plugins": {
    "entries": {
      "openclaw-n8n-facebook-poster": {
        "enabled": true
      }
    }
  }
}

Note: The first person to use a slash command will automatically be registered as an admin if the admin list is empty.

Slash Commands

• /post-start [channel] - Start a new draft.
• /post-cancel - Cancel the current draft.
• /post-send - Send the drafted content and images to n8n.
• /post-status - Check current draft status.
• /post-list - View the history of recently saved posts.
• /set-webhook <url> - Set the n8n webhook URL.

n8n Webhook Payload

The webhook payload sent to n8n is structured as follows:

{
  "content": "Line 1\n\nLine 2",
  "channels": "Fb",
  "files": "https://telegra.ph/...,https://telegra.ph/..."
}