List app extension cards

GET 
/openapi/2026-01/themes/extensions

List the app extension cards that can be added to a template, grouped by app.

Request

Query Parameters

template string

Template name to filter installable blocks, e.g. index

limit int32

Optional max number of results

Responses

200

OK

application/json

Schema

Schema

codestring

error code

messagestring

error message

data object
apps object[]
Apps with their installable blocks
Array [
idstring
App ID
blocksobject[]
Installable cards provided by this app. Each item is a card schema object (type, name, ...) whose shape is not fixed by this API
]

Example

json

{
  "code": "string",
  "message": "string",
  "data": {
    "apps": [
      {
        "id": "string",
        "blocks": [
          {}
        ]
      }
    ]
  }
}