| 200 | OK | Indicates that a request completed successfully and the response contains data. |
| 400 | Bad Request | Your request is invalid. |
| 401 | Unauthorized | Your API key is wrong. |
| 403 | Forbidden | The kitten requested is hidden for administrators only. |
| 404 | Not Found | The specified kitten could not be found. |
| 405 | Method Not Allowed | You tried to access a kitten with an invalid method. |
| 406 | Not Acceptable | You requested a format that isn’t JSON. |
| 429 | Too Many Requests | You’re requesting too many kittens! Slow down! |
| 500 | Internal Server Error | We had a problem with our server. Try again later. |
| 503 | Service Unavailable | We’re temporarily offline for maintenance. Please try again later. |