Network & domains
DNS, TLS certificates, WHOIS/RDAP, uptime checks, robots.txt and sitemaps.
DNS lookup
GET /api/dnsDNS lookup for a domain. Supported record types: A, AAAA, MX, TXT, NS, CNAME.
HTTP check
POST /api/http-checkCheck any public URL: status code, latency, final URL after redirects, and response headers. The uptime primitive for ag…
TLS certificate
POST /api/tls-certInspect the TLS certificate of any public host: subject, issuer, validity window, days remaining, SANs, and SHA-256 fing…
Domain WHOIS (RDAP)
POST /api/whoisDomain registration data via RDAP (the structured WHOIS successor): registrar, creation/expiry dates, status, nameserver…
Robots.txt check
POST /api/robots-checkFetch a site's robots.txt and answer: may this user-agent crawl this path? Returns the matched rule and all declared sit…
Sitemap reader
POST /api/sitemapFetch and parse a sitemap.xml (or sitemap index): returns up to 500 URLs with lastmod, or the child sitemaps of an index…
A2A Agent Card fetch
POST /api/a2a-card-fetchDiscover and fetch a site's A2A (Agent2Agent protocol) Agent Card - tries /.well-known/agent-card.json then /.well-known…
DNS lookup
POST /api/dns-lookupResolve any DNS record type for a host: A, AAAA, MX, TXT, CNAME, NS, SOA, CAA, SRV, PTR. Returns the records plus a coun…
DNS propagation check
POST /api/dns-propagationResolve the same DNS record against 4 public resolvers (Google, Cloudflare, Quad9, OpenDNS) in parallel; surface diverge…
SPF check
POST /api/spf-checkFetch and validate a domain's SPF record (RFC 7208). Parses mechanisms (ip4/ip6/include/a/mx/all), counts DNS lookups ag…
DMARC check
POST /api/dmarc-checkFetch and validate a domain's DMARC policy at _dmarc.<domain> (RFC 7489). Surfaces the enforcement policy (none/quaranti…
DKIM key lookup
POST /api/dkim-lookupFetch and parse a DKIM public-key record at <selector>._domainkey.<domain> (RFC 6376). Returns the parsed key params (al…
Email deliverability check
POST /api/email-deliverabilityEnd-to-end email-auth report for a domain: SPF + DMARC + DKIM (probes common selectors automatically) + MX records + sco…
Certificate transparency search
POST /api/cert-transparencySearch public Certificate Transparency logs (via crt.sh) for every cert issued to a domain. Returns the cert list plus a…
HTTP headers + security analysis
POST /api/http-headersFetch a URL and return every response header plus a security analysis: HSTS, CSP, X-Frame-Options, X-Content-Type-Option…
Tech stack detection
POST /api/tech-stackDetect the technology stack of a public website: CDN, web server, language/runtime, frontend framework (Next.js, Nuxt, S…
ASN + IP geolocation
POST /api/asn-infoLook up the Autonomous System (ASN), prefix, country, registry, and allocation date for an IPv4 address - or for a hostn…
Gravatar existence check
POST /api/gravatar-checkCheck whether an email address has a Gravatar: hashes the normalized email (MD5, pure CPU - the raw address is never sen…