400 Bad Request
The server cannot or will not process the request due to something that is perceived to be a client error.
Explanation
The 400 (Bad Request) status code indicates that the server cannot or will not process the request due to something that is perceived to be a client error. This includes malformed request syntax, invalid request message framing, deceptive request routing, or the request contains invalid parameters, corrupt headers, or exceeds size limits.
The client SHOULD NOT repeat the request without modifications. If the request was well-formed but the processing was unsuccessful due to semantic errors in the content, a more specific 4xx error code may be more appropriate.
Common reasons for a 400 error include:
- Invalid syntax in the request
- Missing required parameters
- Invalid parameter values
- JSON or XML in the request body that cannot be parsed
- Corrupt cookies
Example Response
HTTP/1.1 400 Bad Request
Content-Type: application/json
{"error": "Bad Request", "message": "Missing required parameter 'user_id'"}
Related Status Codes
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