matrix-authentication-service/policies/schema/client_registration_input.json

{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "ClientRegistrationInput",
  "description": "Input for the client registration policy.",
  "type": "object",
  "required": [
    "client_metadata"
  ],
  "properties": {
    "client_metadata": {
      "type": "object",
      "additionalProperties": true
    }
  }
}