Cause

Authorization header is missing or does not contain a gando_pk_ API key.

Partner action

Send Authorization Bearer gando_pk_... on every Partner API request.

Gando action (internal)

N/A — partner configuration issue.

Example response

{
  "error": {
    "code": "missing_api_key",
    "message": "Missing or invalid partner API key",
    "requestId": "req_abc123"
  }
}