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Platforms

Kit: posting rules and settings

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

Beta

New in Postemi and not yet tested with many accounts. Tell us if something does not work.

Basics

Platform
Kit
Character limit
The platform does not specify a general limit.
Media
Pictures go into the e-mail body; a video is added as a link.
settings.__type
kit
Required fields
No required settings fields.

Rules

  • At the scheduled time Postemi creates the broadcast and Kit sends it to the chosen audience.
  • Postemi reads only the names of your tags and segments. It does not export or keep subscribers.
  • Beta: not yet tested with many accounts.

Settings fields

These fields go into the post's settings object, alongside the __type field. In the UI, you fill in the same ones in the channel's settings section.

FieldTypeRequiredWhat it does
subjectstring, up to 255 charactersnoEmpty: the first line of the post.
previewstring, up to 255 charactersnoThe preview line that inboxes show.
audiencestringnotag:<id> or segment:<id> from the audiences lookup. Empty: all subscribers.

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": "kit" }
}

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.

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