{"uid":"cap_9LNzLlF_b3yuoDhXh7DqB","slug":"sift-web-tools-site-check-ba6c2e2a","name":"Sift Web Tools – Site Check","description":"Domain health: DNS, SPF/DMARC, TLS certificate expiry, security headers. One-call domain audit: A/AAAA/MX/NS/CAA records, SPF and DMARC, TLS issuer and days to expiry, redirect chain and security-header score.","url":"https://sift.srv1996466.hstgr.cloud/v1/site-check?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","required":["domain"],"properties":{"domain":{"type":"string","description":"Domain, e.g. example.com"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"tls":{"valid":true,"days_left":80},"http":{"security_header_score":"2/6"},"domain":"example.com"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.004","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":"$0.004/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.004","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.004","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_tcJDQApCfxeJYByoLw4ic","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.004","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks a domain's TLS certificate validity, HTTP security headers, and general site health in one call","exampleAgentPrompt":"Can you run a site health check on stripe.com and tell me if the TLS certificate is valid, how many days are left on it, and what security header score it gets?","exampleUseCases":[{"title":"Pre-outreach domain security audit","prompt":"Before I send a cold email campaign to leads from acmecorp.com, can you check whether their site has a valid SSL cert and decent HTTP security headers?"},{"title":"Vendor due diligence check","prompt":"We're evaluating a new SaaS vendor at vendor-xyz.io — can you quickly check their site's TLS certificate status and security header score so I can include it in our security review?"},{"title":"Monitor partner site certificate expiry","prompt":"Can you check how many days are left on the TLS certificate for partner-portal.example.com? I want to know if it's about to expire so I can flag it to their team."}],"resultDescription":"Returns a JSON object with TLS validity (boolean) and days remaining on the certificate, an HTTP security header score (e.g. '2/6'), and the checked domain name. Provides a quick snapshot of a site's basic security posture.","failureModes":["Invalid or non-existent domain returns an error or empty result","Domain with no HTTP server returns connection failure","Payment not processed (non-200) means no charge but also no result","Rate limiting or network timeouts on slow-responding domains"],"whenToPreferThis":"Use this endpoint when you need a quick, structured check of a domain's TLS certificate status and HTTP security headers without doing a full audit. Ideal for pre-outreach checks, vendor evaluations, or certificate expiry monitoring. Prefer it over full WHOIS or crawl endpoints when you only need security posture signals.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-23T18:33:13.955Z","isFirstParty":false,"canonicalSlug":"sift-web-tools-site-check-ba6c2e2a"}