| 400 | The request was not accepted, often due to missing parameters, bad syntax, or a missing Content-Type header. |
| 401 | The required authentication credentials are missing or incorrect. |
| 403 | The server is refusing to respond, usually because you do not have access or permission to the requested resource. |
| 404 | The requested resource doesn’t exist. |
| 422 | The request body was well-formed but contains semantic errors (e.g. insufficient points balance). Refer to the response body for further information. |
| 429 | Your API token has exceeded its rate limit. |
| 500 | An internal error occurred in Yuko. Retry your request. If the issue persists, contact Yuko support. |
| 503 | The server is currently unavailable. |
