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Here is a list of the most common response codes:
| Code | Meaning | Description |
|---|---|---|
| 200 | OK | The request was successful and the response contains the requested data. |
| 201 | Created | The request was successful, and a new resource was created. |
| 202 | Accepted | The request was accepted for processing but not completed yet. |
| 204 | No Content | The request was successful, but there is no response body. |
| 205 | Reset Content | The request was successful; the client should reset the document view. |
| 400 | Bad Request | The request is malformed or invalid (e.g., incorrect JSON, missing fields). |
| 401 | Unauthorized | Authentication is required but missing or invalid. |
| 403 | Forbidden | The request is understood, but the client is not allowed to access the resource. |
| 404 | Not Found | The requested resource does not exist. |
| 405 | Method Not Allowed | The HTTP method is not supported for this resource. |
| 408 | Request Timeout | The server timed out waiting for the client’s request. |
| 409 | Conflict | The request conflicts with the current state of the resource (e.g., duplicate record). |
| 415 | Unsupported Media Type | The request body format is unsupported (e.g., sending XML when JSON is required). |
| 429 | Too Many Requests | The client has sent too many requests in a short time (rate limiting). |
| 500 | Internal Server Error | A generic server-side error. |
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