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The following table lists error codes common to the IoT Central REST APIs.
Common error codes
| Error code | Description | HTTP status code |
|---|---|---|
| 400 | The request received could not be understood by the service. | |
| 401 | The authorization token cannot be validated; for example, it is expired or does not apply to the request’s URI and/or method. | 401 Unauthorized |
| 403 | The provider credentials do not have sufficient privileges | 403 Forbidden |
| 404 | The IoT Central instance or a device identity does not exist. | 404 Not Found |
| 412 | The etag in the request does not match the etag of the existing resource, as per RFC7232. | 412 Precondition failed. |
| 422 | The body of the request could not be validated. | 422 Unprocessable Entity |
| 429 | The number of requests exceeded the environment threshold. Please try again later. | 429 Too Many Requests |
| 500 | An internal error occurred. | 500 Internal Server Error |