# Response Codes

Please be sure to include both the error code and/or error response when submitting support tickets related to the SMS API.

The SMS API utilizes the following HTTP status codes:

| Error Code | Meaning                                                                       |
| ---------- | ----------------------------------------------------------------------------- |
| 200        | `OK` - Your request was executed, as expected.                                |
| 403        | `Not Authorized` - Your API Key is not authorized to use the given DID.       |
| 404        | `Not Found` - The resource you were trying to access was not found.           |
| 422        | `Unauthorized` -- Your API key is wrong.                                      |
| 405        | `Method Not Allowed` -- You tried to access a kitten with an invalid method.  |
| 406        | `Not Acceptable` - You requested a format other than `application/json`.      |
| 418        | `I'm a teapot` - If you see this, you are not where you are supposed to be.   |
| 429        | `Too Many Requests` - You have exceeded the API rate limit.                   |
| 500        | `Internal Server Error` -- We had a problem with our server. Try again later. |