Google Chat: posting rules and settings

What a Google Chat channel accepts in Postemi: media, limits, required fields, and the fields of the settings object for the API.

Basics

Rules

• Google Chat has no platform-specific settings. The __type field is enough in the settings object.
• You connect with the incoming webhook URL of a space (Google Workspace). Postemi stores it encrypted and never returns it.
• One-way: Postemi sends, it does not read the space.
• Beta: not yet tested with many spaces.

Settings fields

Examples

Each example is one item in the POST /public/v1/posts request's posts array. The envelope around it is always this:

{
  "type": "schedule",
  "date": "2026-09-15T09:00:00.000Z",
  "shortLink": false,
  "posts": [ /* the item below */ ]
}

{
  "integration": { "id": "<channel-id>" },
  "value": [{ "content": "<p>The text of the post.</p>", "image": [] }],
  "settings": { "__type": "google-chat" }
}

The channel ID comes from the channel list, and the path values for images and videos from media upload. The exact schema for the connected account comes from the settings schema endpoint. From the command line, the same thing is the --settings flag. See the CLI examples.