APIs & Agentic AI
HTTP status code reference
Search a dated curated subset of common IANA HTTP status codes by code or name. Includes category labels and the authoritative registry link.
A curated subset of 29 common HTTP status codes, checked against the IANA HTTP Status Code Registry on 4 October 2026. Codes not shown may be registered elsewhere in the full registry. This lookup does not send an HTTP request or diagnose an endpoint.
29 matching entries in this supported subset.
| Code | Name | Category |
|---|---|---|
| 100 | Continue | Informational |
| 101 | Switching Protocols | Informational |
| 200 | OK | Success |
| 201 | Created | Success |
| 202 | Accepted | Success |
| 204 | No Content | Success |
| 206 | Partial Content | Success |
| 301 | Moved Permanently | Redirection |
| 302 | Found | Redirection |
| 303 | See Other | Redirection |
| 304 | Not Modified | Redirection |
| 307 | Temporary Redirect | Redirection |
| 308 | Permanent Redirect | Redirection |
| 400 | Bad Request | Client error |
| 401 | Unauthorized | Client error |
| 403 | Forbidden | Client error |
| 404 | Not Found | Client error |
| 405 | Method Not Allowed | Client error |
| 409 | Conflict | Client error |
| 410 | Gone | Client error |
| 413 | Content Too Large | Client error |
| 415 | Unsupported Media Type | Client error |
| 422 | Unprocessable Content | Client error |
| 429 | Too Many Requests | Client error |
| 500 | Internal Server Error | Server error |
| 501 | Not Implemented | Server error |
| 502 | Bad Gateway | Server error |
| 503 | Service Unavailable | Server error |
| 504 | Gateway Timeout | Server error |
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