{"uid":"cap_UBRBwG4ZKPdXPIoU5jX0A","slug":"preflight-agentdiet-dev-domain-osint-tls-certificate-security-headers-04eafee7","name":"Domain OSINT, TLS Certificate & Security Headers Recon","description":"Inspects live IPv4/IPv6 DNS resolution, TLS certificate issuer/expiry, and HTTP security grade. (Live x402 v2, IETF MPP & MCP endpoint at https://preflight.agentdiet.dev/v1/cert-transparency)","url":"https://preflight.agentdiet.dev/v1/cert-transparency?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","required":["domain"],"properties":{"domain":{"type":"string","minLength":1,"description":"Target domain name (e.g. anthropic.com, openai.com) for DNS, TLS certificate, and security header OSINT"}}},"responseSchema":{"type":"object"},"example":null,"exampleRequest":null,"tags":[],"displayCostAmount":"0.01","displayCostAsset":"USD","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":"$0.01/call","primary":{"kind":"static","protocol":"mpp","network":"tempo","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"mpp","network":"tempo","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_oV5c9rSgUC5E0LF99XgnF","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"preflight.agentdiet.dev","brandSlug":"preflight-agentdiet-dev-mpp","brandBaseUrl":"https://preflight.agentdiet.dev","brandDocsUrl":null,"whatItDoes":"Performs live DNS resolution (IPv4/IPv6), TLS certificate inspection (issuer, expiry), and HTTP security header grading for any given domain","exampleAgentPrompt":"Can you check the TLS certificate details, DNS resolution, and HTTP security headers for openai.com — I want to know who issued the cert, when it expires, and how the security headers are graded?","exampleUseCases":[{"title":"Pre-acquisition domain security check","prompt":"Before we finalize acquiring that startup, can you run a full domain OSINT check on theirstartup.com — I need to see their TLS cert issuer and expiry, whether they have IPv6, and how their HTTP security headers stack up?"},{"title":"Monitoring vendor SSL expiry","prompt":"Can you check whether the SSL certificate for our payment processor's domain stripe.com is still valid and when it expires? I want to make sure it's not about to lapse."},{"title":"Investigating suspicious domain infrastructure","prompt":"I got an email from paypa1.com and it looks phishing-y — can you pull the DNS resolution, TLS certificate details, and security header grade on that domain so I can see if it's legit?"}],"resultDescription":"Returns live DNS resolution data (IPv4/IPv6 addresses), TLS certificate metadata (issuer, validity dates, expiry status), and an HTTP security grade reflecting the presence or absence of security headers such as HSTS, CSP, X-Frame-Options, and similar directives for the queried domain.","failureModes":["Domain does not exist or fails DNS resolution — no records returned","Domain is unreachable or times out during live probing — connection error","Domain has no TLS certificate (HTTP only) — TLS fields absent or null","Invalid domain input (e.g. empty string, malformed) — validation error","Temporary upstream resolution failure — retry may resolve"],"whenToPreferThis":"Choose this endpoint when you need a single-call OSINT sweep of a domain's DNS, TLS, and HTTP security posture without setting up infrastructure. Ideal for security reconnaissance, pre-acquisition due diligence, phishing domain investigation, or vendor security validation. Prefer this over manual lookups or separate DNS/SSL tools when you need combined certificate, DNS, and security header data in one response at low cost ($0.01/call).","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:26:25.346Z","isFirstParty":false,"canonicalSlug":"preflight-agentdiet-dev-domain-osint-tls-certificate-security-headers-fa82a7d0"}