How to Use the HTTP Status Code Search & Reference
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1
Type any HTTP status code number (e.g. 403, 502, 304) or keyword (e.g. "redirect", "unauthorized", "gateway").
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2
Filter by status class: 1xx Informational, 2xx Success, 3xx Redirection, 4xx Client Error, 5xx Server Error.
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3
Inspect the official RFC specification, caching eligibility, and common troubleshooting steps.
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4
Copy the quick explanation for your API documentation.
Practical Example & Use Case
Common Real-World Scenario
Checking whether an HTTP 308 Permanent Redirect preserves the POST request body method according to RFC 7538.
Technical Notes & Limitations
Browser Engine Architecture
Covers standard IANA HTTP codes and widespread non-standard extensions (e.g. Cloudflare 520-524).
Frequently Asked Questions
What is the difference between 301 and 308?
301 allows browsers to change POST requests to GET; 308 strictly forbids changing the HTTP request method during redirect.