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HTTP Header Explainer
x402
HTTP Header Explainer is a paid API for AI agents from intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Returns a detailed explanation of one or more HTTP header names, including their purpose, typical values, an example, whether they are request/response headers, and a security relevance flag.
Price / call$0.01
Success—
StatusUnknown
How this service works
Explains HTTP headers: for each header name you give (comma-separated), what it does, typical values and an example, plus whether it is a request, response or both, and a security relevance flag. Covers 60+ common headers including security, caching, CORS, cookies and x402 payment headers. $0.01 per lookup.
Output
For each queried header name, the endpoint returns what the header does, its typical values, a concrete example, whether it appears in requests, responses, or both, and a flag indicating its security relevance. Covers 60+ common headers spanning security, caching, CORS, cookies, and x402 payment headers.
Example use cases
Auditing security headers on a web app
“I'm reviewing my app's HTTP headers for security — can you explain what X-Frame-Options, X-Content-Type-Options, and Strict-Transport-Security do, including whether they're request or response headers and how security-critical they are?”
Understanding CORS headers for API integration
“I keep getting CORS errors when calling an API — can you explain what the Access-Control-Allow-Origin, Access-Control-Allow-Headers, and Access-Control-Allow-Methods headers do and what values they typically take?”
Learning about x402 payment headers
“I'm building an x402 payment-gated API — can you explain the X-402-Payment header, what it does, and what typical values look like?”
Technical details
Endpoint
GEThttps://intel.rallylive.ca/dev/http-header-explainWhen to prefer
Use this endpoint when an agent or developer needs quick, structured explanations of HTTP headers by name — especially useful for documentation generation, security audits, onboarding workflows, or debugging unfamiliar headers. Prefer this over a generic web search when you need structured, machine-readable output (type, example, security flag) rather than free-form prose.
Side effects
- Unknown or unsupported header name returns no explanation or an error
- Malformed comma-separated input may cause parsing failures
- Header names with typos may not match any known entry
- Very new or non-standard headers outside the 60+ covered set may not be recognized
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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