Chat message posted

Fires when a message is posted in a public chat channel.


Event	`chat.message.posted`
Code	1202
Group	Chat (1200)
Since	2026-10-21

Select the event chat.message.posted or the whole Chat group on your endpoint. Filters:

spaceIds: community-level event, always delivered whatever the spaces filter.

`data` fields

Field	Type	Always present
`attachments`	object[]	✅ Yes
`author`	WebhookMember	✅ Yes
`channel`	WebhookChannel	✅ Yes
`text`	string	✅ Yes
`threadId`	string \| null	❌ No

Sample delivery

{
  "event": "chat.message.posted",
  "timeStamp": 1792600000000,
  "data": {
    "channel": {
      "id": "00000000-0000-4000-8000-000000000016",
      "name": "general",
      "displayName": "General",
      "url": "https://community.example.com/chat/general"
    },
    "author": {
      "id": "00000000-0000-4000-8000-000000000001",
      "name": "Ada Example",
      "email": "ada@example.com",
      "role": "Member",
      "profileUrl": "https://community.example.com/profile/00000000-0000-4000-8000-000000000001",
      "avatarUrl": "https://community.example.com/avatars/ada.png"
    },
    "text": "Hello all",
    "attachments": [
      {
        "name": "a.png",
        "url": "https://community.example.com/files/a.png"
      }
    ],
    "threadId": null
  },
  "id": "evt_8f2b1c3d-4e5f-4a6b-9c7d-0e1f2a3b4c5d",
  "code": 1202,
  "group": "chat",
  "version": "2026-10-21",
  "communityId": "64f1c0ffee0000000000c0de",
  "occurredAt": "2026-10-21T15:00:00.000Z",
  "attempt": 1,
  "isTest": false
}

Handling

Verify x-networked-signature against the raw body before you trust the request.

Answer any 2xx within 10 seconds and process the event afterwards.

Deduplicate on id: retries and resends carry the same id.

Ignore keys and event types you do not handle; keys may be added, never removed or renamed.

curl --location 'https://your-api-server.com' \ --header 'x-networked-signature: t=1792600000,v1=5f1a…' \ --header 'x-networked-event: chat.message.posted' \ --header 'x-networked-event-id: evt_8f2b1c3d-4e5f-4a6b-9c7d-0e1f2a3b4c5d' \ --header 'x-networked-event-code: 1202' \ --header 'x-networked-delivery-id: dlv_2c9e1a7b-3f4d-4b5e-8a6c-7d8e9f0a1b2c' \ --header 'x-webhook-signature: 9a3c…' \ --header 'x-webhook-timestamp: 1792600000000' \ --header 'Content-Type: application/json' \ --data-raw '{ "event": "chat.message.posted", "timeStamp": 1792600000000, "data": { "channel": { "id": "00000000-0000-4000-8000-000000000016", "name": "general", "displayName": "General", "url": "https://community.example.com/chat/general" }, "author": { "id": "00000000-0000-4000-8000-000000000001", "name": "Ada Example", "email": "ada@example.com", "role": "Member", "profileUrl": "https://community.example.com/profile/00000000-0000-4000-8000-000000000001", "avatarUrl": "https://community.example.com/avatars/ada.png" }, "text": "Hello all", "attachments": [ { "name": "a.png", "url": "https://community.example.com/files/a.png" } ], "threadId": null }, "id": "evt_8f2b1c3d-4e5f-4a6b-9c7d-0e1f2a3b4c5d", "code": 1202, "group": "chat", "version": "2026-10-21", "communityId": "64f1c0ffee0000000000c0de", "occurredAt": "2026-10-21T15:00:00.000Z", "attempt": 1, "isTest": false }'

Chat message posted