{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "BatchRequestItem",
  "type": "object",
  "description": "A single request within a message batch.",
  "properties": {
    "custom_id": {
      "type": "string",
      "description": "Developer-provided identifier for this request. Must be unique within the batch. Used to match results to requests."
    }
  }
}