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Dev Reference – HTTP Status Code Lookup
x402
Dev Reference – HTTP Status Code Lookup is a paid API for AI agents from dev-reference.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-26).
Returns the meaning, typical cause, client action, and cacheability of any HTTP status code from the IANA registry and RFC 9110.
Price / call$0.02
Success—
StatusUnknown
How this service works
HTTP status code meaning, typical cause, client action and cacheability, from the IANA registry and RFC 9110.
Output
A structured record containing the status code number, its official name, class (1xx–5xx), one-line meaning, typical cause, recommended client action, retry hint, whether it is cacheable by default, whether it is IANA-registered, the authoritative RFC reference, any vendor-specific notes, and a summary verdict — all sourced from the IANA registry and RFC 9110.
Example use cases
Debugging unexpected API error
“I'm getting a 502 from an upstream API — what does that mean, what usually causes it, and what should my client do next?”
Building retry logic for HTTP client
“For HTTP status 503, tell me the official meaning, whether clients should retry, and any retry hints from the RFC so I can wire up my retry logic correctly.”
Checking cacheability of a response code
“Is a 301 redirect cacheable by default according to the HTTP spec, and what's the official IANA name for it?”
Technical details
Endpoint
GEThttps://dev-reference.x402tookit.com/http-status?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need authoritative, spec-grounded information about a specific HTTP status code — including its IANA registration status, RFC 9110 semantics, cacheability, and actionable client guidance. Prefer it over general web search when you need structured, machine-readable output for use in retry logic, error handling, documentation generation, or developer tooling.
Side effects
- Code out of range (below 100 or above 599) — likely returns an error or null fields
- Unregistered or proprietary status codes may return partial data with registered=false
- Missing required 'code' query parameter returns a validation error
- Non-integer input rejected by schema validation
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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