The lookup covers a built-in list of common status codes
It is a quick reference for widely used HTTP codes, not a complete registry of every standardized or vendor-specific code.
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Look up HTTP status code meanings and categories.
Search a built-in list of common HTTP status codes by numeric code or words in the status name.
404 or a keyword such as Not Found.404 directly finds 404 Not Found. A word query can match status names when that word is present in the built-in list.The built-in table contains common codes, not every registered or vendor-specific HTTP status code. Absence from the result does not prove that a code is invalid.
It is a quick reference for widely used HTTP codes, not a complete registry of every standardized or vendor-specific code.
A query is checked against the textual code as well as the lowercase status name.
Finding 429 Too Many Requests tells you the code name; it does not inspect your server response headers, retry policy or rate-limit configuration.
A status name tells you what the response category means, but diagnosing the cause still depends on the server, API, proxy or application that returned it.