{"uid":"cap_ZwVOXPCHcZ9pPPycm9gbD","slug":"agentshelf-syntexa-ch-http-headers-fetcher-b5e70f52","name":"agentshelf.syntexa.ch HTTP Headers Fetcher","description":"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.","url":"https://agentshelf.syntexa.ch/v1/http-headers?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"url":{"type":"string","examples":["https://example.com/"],"maxLength":2048,"minLength":8,"description":"Public http(s) URL. Private hosts are rejected."},"method":{"enum":["HEAD","GET"],"type":"string","examples":["HEAD"],"description":"HEAD or GET. Omit it to try HEAD and fall back to GET."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_6ErInSYp2BL7b-4Ys6wPP","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Fetches response headers from a public URL using an SSRF-safe HEAD or GET request","exampleAgentPrompt":"Can you fetch the response headers for https://example.com using a HEAD request so I can see what server and cache settings it uses?","exampleUseCases":[{"title":"Check CDN and cache headers","prompt":"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."},{"title":"Verify CORS policy on API endpoint","prompt":"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?"},{"title":"Detect redirect and content type","prompt":"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."}],"resultDescription":"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.","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T06:47:33.417Z","isFirstParty":false,"canonicalSlug":"agentshelf-syntexa-ch-http-headers-fetcher-b5e70f52"}