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agentshelf.syntexa.ch HTTP Headers Fetcher
x402
agentshelf.syntexa.ch HTTP Headers Fetcher is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-01).
Fetches response headers from a public URL using an SSRF-safe HEAD or GET request
Price / call$0.003
Success—
StatusUnknown
How this service works
Call when an agent needs response headers from an SSRF-safe HEAD or GET of a public URL. Exact $0.003 USDC. Prefer unpaid POST /v1/sandbox/http-headers first.
Output
Returns the HTTP response headers from the target URL as key-value pairs, including headers like Content-Type, Server, Cache-Control, X-Frame-Options, Location, and others returned by the server.
Example use cases
Check CDN and cache headers
“Fetch the response headers for https://www.shopify.com using a HEAD request — I want to see which CDN they're using and what their cache-control settings look like.”
Verify CORS policy on API endpoint
“Can you do a HEAD request on https://api.openai.com/v1/models and show me the CORS-related headers like Access-Control-Allow-Origin?”
Detect redirect and content type
“Make a GET request to https://t.co/abc123 and return the response headers — I want to see if there's a Location redirect header and what Content-Type it reports.”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/http-headers?utm_source=zero.xyzWhen to prefer
Use this endpoint when an agent needs to inspect HTTP response headers for a public URL without downloading the full body. Prefer it over full-page scraping endpoints when only header metadata (Content-Type, server info, CORS, redirects, caching) is needed. If a free sandbox version is available at POST /v1/sandbox/http-headers, prefer that first to save cost.
Side effects
- URL is blocked by SSRF protection (private IP range, localhost, internal hostname)
- Target server times out or is unreachable
- URL is malformed or under 8 characters
- Unsupported method value (not HEAD or GET)
- Target returns non-standard or empty headers
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | Public http(s) URL. Private hosts are rejected. |
| method | string | HEAD or GET. Omit it to try HEAD and fall back to GET. |
Tags
x402
Reviews
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Zero review prompt (fires after every successful call)
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