Inbox message

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/api-evangelist/customer-io/main/json-schema/customer-io-update-inbox-content-schema.json",
  "title": "Inbox message",
  "description": "Update the contents of an inbox message newsletter variant.",
  "x-generated": "2026-10-12",
  "x-method": "derived",
  "x-generator": "derive-json-schema.py",
  "x-source": "openapi/customer-io-newsletter-variants-api-openapi.yml#/components/schemas/updateInboxContent",
  "allOf": [
    {
      "type": "object",
      "properties": {
        "type": {
          "x-scalar-ignore": true,
          "description": "Channel type for a newsletter or newsletter content variant.",
          "type": "string",
          "enum": [
            "email",
            "webhook",
            "twilio",
            "push",
            "in_app",
            "inbox"
          ],
          "readOnly": true
        },
        "deduplicate_id": {
          "x-scalar-ignore": true,
          "type": "string",
          "readOnly": true,
          "description": "An identifier in the format `id:timestamp` where the id is for the object you're working with (Campaigns, Deliveries, Exports, Identities, Newsletters, Segments, and Templates), and the timestamp is the last time the object was updated."
        }
      }
    },
    {
      "type": "object",
      "properties": {
        "type": {
          "type": "string",
          "enum": [
            "inbox"
          ],
          "readOnly": true
        },
        "body_json": {
          "type": "string",
          "description": "JSON body content for the inbox message, as a stringified JSON object. The fields you include depend on how you [set up your inbox](/journeys/channels/in-app/inbox/setup/):\n- `topics`—array, topics your audience can filter by in their inbox\n- `type`—string, context that helps render the inbox message\n- `properties`—object, your message info like the title, body, link, and image\n- `expiration`—object; if omitted, the message expires after 30 days. Otherwise set `type` (`relative` or `absolute`), `unit` (`seconds`, `minutes`, `hours`, or `days`; relative only), and `value` (number of units, or a unix timestamp if absolute)\n"
        }
      }
    }
  ]
}