13 common HTTP Status Codes errors with verified solutions.
The server cannot process the request due to malformed syntax, invalid parameters, or bad encoding.
The request requires authentication. The client must provide valid credentials.
The server understood the request but refuses to authorize it. Authentication won't help — the user lacks permissions.
The server cannot find the requested resource. The URL may be wrong, the resource may have been deleted, or the route doesn't exist.
The HTTP method (GET, POST, PUT, DELETE) is not supported for this endpoint.
The resource existed but has been permanently removed. Unlike 404, this explicitly tells clients the resource won't come back.
The server refuses the request because the Content-Type is not supported.
The request was well-formed but the server cannot process it due to semantic errors (e.g., validation failures).
The client has sent too many requests in a given time period. The server is rate-limiting to protect itself.
The server encountered an unexpected condition that prevented it from fulfilling the request.
A proxy or gateway received an invalid response from an upstream server.
The server is temporarily unable to handle the request, usually due to maintenance or overload.
A gateway or proxy did not receive a timely response from the upstream server.