HTTP Status Lookup

API & Web

Look up the standard meaning of an HTTP response status.

HTTP status lookup

Look up standard and extension codes from 100–599

Enter a status code to see its meaning

Use cases

Look up the standard meaning of an HTTP response status.

1Clarify the difference between 401 and 403

2Inspect a 429 response before adding retry logic

3Document an API error response

4Parse URLs, run XPath queries, and inspect HTTP status codes

5Build minimal reproducible HTTP requests for frontend/backend debugging

6Review error codes and API compatibility before release

Guidance

IANA status semantics are standard, but individual APIs can attach business-specific meanings.

Inspect the components and query parameters of an absolute URL.

Turn common cURL requests into JavaScript Fetch or Axios code.

Test HTTP APIs directly from the browser.

Check pasted CORS response headers for common preflight and credentialed-request errors.