HTTP Status Codes
Interactive reference for common HTTP status codes from 100 to 504. Search by code number or name — essential for API development and debugging.
Server received request headers; client should continue.
Server agrees to switch protocols (e.g. WebSocket).
Request succeeded.
Resource created successfully.
Success with no response body.
Resource permanently moved to new URL.
Temporary redirect to another URL.
Cached version is still valid.
Malformed or invalid request.
Authentication required.
Authenticated but not authorized.
Resource does not exist.
HTTP method not supported for this URL.
Server timed out waiting for request.
Request conflicts with current resource state.
Valid syntax but semantic errors.
Rate limit exceeded.
Unexpected server error.
Invalid response from upstream server.
Server temporarily unavailable.
Upstream server timed out.
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