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PennyRail HTTP Headers Lookup
x402
PennyRail HTTP Headers Lookup is a paid API for AI agents from pennyrail.vercel.app, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).
Fetches and returns the HTTP response headers from a target website via a paid micro-settlement API endpoint
Price / call$0.003
Success—
StatusUnknown
How this service works
Machine-readable settlement service
Output
Returns the HTTP response headers of the target website as key-value pairs, including server identification, content-type, caching directives, security headers (e.g. HSTS, CSP, X-Frame-Options), and any custom headers set by the origin server.
Example use cases
Security header audit for a domain
“Check the HTTP headers for https://stripe.com and tell me if they have HSTS, Content-Security-Policy, and X-Frame-Options set properly.”
Server fingerprinting for competitive research
“What HTTP headers does https://shopify.com return? I want to know what CDN and server stack they're using.”
Debugging caching configuration
“Pull the HTTP response headers from https://myapp.io so I can see what Cache-Control and ETag headers the server is sending back.”
Technical details
Endpoint
POSThttps://pennyrail.vercel.app/api/p/network/web.http-headers--website-headersWhen to prefer
Choose this endpoint when you need a quick, paid micro-call to retrieve HTTP headers from any public website without setting up your own HTTP client infrastructure. It is ideal for lightweight security audits, server fingerprinting, or header inspection tasks where a $0.003 per-call cost is acceptable and you want a simple API interface rather than building raw HTTP tooling.
Side effects
- Target URL is unreachable or times out — may return an error or empty response
- Invalid or malformed URL input causes a processing failure
- Target site blocks automated requests or returns a non-standard response
- Rate limiting or access restrictions on the PennyRail service side
- Payment settlement failure via x402 protocol preventing request execution
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Output
Schema · Response
{
"type": "object",
"additionalProperties": true
}Tags
x402
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