Send Facebook Group Posts to Your Webhook

With the Groups Watcher Pro plan, new posts from the Facebook groups and pages you monitor are sent to a webhook URL you provide. We send the group name, post text, links, and related details so your app, script, or automation can use each update. Most alerts arrive in under 60 seconds.

This feature is available on the Pro plan. Check pricing here.

Test your webhook

Before or after configuring your endpoint, open Send test webhook. Pick the sample that matches how your campaign sends posts (one post at a time or a batched list). Enter your webhook URL and we send a test so you can confirm everything works.

Request

• Method: POST
• Headers: Content-Type: application/json
• Body: Structured data with either message + data (one post), or message + posts + a top level timestamp when using a custom webhook configured for all posts (see below).

Payload

Use the sections below for the two custom webhook formats. Other channels (Slack, Discord, etc.) use their own formats; this page focuses on your own HTTP endpoint.

Single post per request (default)

When your custom webhook is set to receive only posts that match your rules (keywords / AI validation), each POST has a short message and a data object with all post fields. Map data.group_name, data.post_url, data.body, etc.

{
  "message": "<string>",
  "data": {
    "group_name": "<string>",
    "group_id": "<string>",
    "poster_name": "<string>",
    "poster_url": "<string>",
    "post_url": "<string>",
    "group_url": "<string>",
    "post_id": "<string>",
    "post_type": "regular_post" | "marketplace",
    "body": "<string>",
    "images": ["<url>", ...],
    "videos": ["<url>", ...],
    "timestamp": "<ISO 8601 string>"
  }
}

Batched payload (custom webhook, all posts)

In your Pro campaign (or client setup), if you add a custom webhook and set it to receive all posts from your monitored groups, including posts that do not pass keyword or AI filters, we deliver a single POST per batch with this shape. The message summarizes the count (for example 1 new post in your groups or 3 new posts in your groups). Each element of posts uses the same field names as data above, but as a flat object inside the array (no nested data). The top-level timestamp is when we sent the webhook. The number of items in posts depends on how many new posts were included in that processing run.

{
  "message": "2 new posts in your groups",
  "posts": [
    {
      "group_name": "<string>",
      "group_id": "<string>",
      "group_url": "<string>",
      "poster_name": "<string>",
      "poster_url": "<string>",
      "post_url": "<string>",
      "post_id": "<string>",
      "post_type": "regular_post" | "marketplace",
      "body": "<string>",
      "images": ["<url>", ...],
      "videos": ["<url>", ...],
      "timestamp": "<ISO 8601 string>"
    },
    {
      "group_name": "<string>",
      "group_id": "<string>",
      "group_url": "<string>",
      "poster_name": "<string>",
      "poster_url": "<string>",
      "post_url": "<string>",
      "post_id": "<string>",
      "post_type": "regular_post" | "marketplace",
      "body": "<string>",
      "images": ["<url>", ...],
      "videos": ["<url>", ...],
      "timestamp": "<ISO 8601 string>"
    }
  ],
  "timestamp": "<ISO 8601 string>"
}

Slack, Discord, ntfy, and Teams do not use this batched layout. It only applies to webhook and custom URLs when the all posts option is enabled.

Field reference (data object)

For the batched webhook that receives all posts, each object in posts uses the same keys as data above (group_name, post_url, body, etc.), plus a per item timestamp.

Examples

Single post: regular post (with images)

{
  "message": "New post in Tampa Bay Homeowners",
  "data": {
    "group_name": "Tampa Bay Homeowners",
    "group_id": "123456789",
    "poster_name": "Maria Johnson",
    "poster_url": "https://facebook.com/maria.johnson",
    "post_url": "https://www.facebook.com/groups/123456789/permalink/987654321012345/",
    "group_url": "https://www.facebook.com/groups/123456789",
    "post_id": "987654321012345",
    "post_type": "regular_post",
    "body": "Anyone have a good HVAC person in St. Pete? Our AC went out last night",
    "images": ["https://scontent.xx.fbcdn.net/v/.../image1.jpg", "https://.../image2.jpg"],
    "videos": [],
    "timestamp": "2026-02-11T14:30:00.000Z"
  }
}

Example: n8n (Slack, Email, SMS, Discord)

You can use the webhook payload in n8n in several ways: post to Slack, send an email, send an SMS via Twilio, and post to Discord. Build a workflow with a Webhook trigger, then add the branches you need. Save the workflow in n8n before testing the webhook URL.

Frequently asked questions