Common HTTP Error Codes

400 Bad Request

• The server cannot process the request due to a client error (e.g., malformed request syntax, invalid request message parameters, or malformed entity body in the request)
• Example: GET /en/docs/developer/error-codes HTTP/1.1 with missing headers

401 Unauthorized

• Authentication is required and has failed or not been provided
• Example: Missing API key in request headers Learn more about authentication

404 Not Found

• The requested resource could not be found but may be available in the future
• Example: GET /en/docs/developer/nonexistent-path HTTP/1.1

500 Internal Server Error

• A generic error message, given when an unexpected condition was encountered
• Example: Application crash during request processing