DNS/domain-security intelligence for agents: A/AAAA/MX/TXT/NS/CNAME/SOA, structured CAA issuance policy, SPF/DMARC, parsed common-selector DKIM evidence, MTA-STS/TLS-RPT, BIMI readiness, DNSSEC plus RDAP age/expiry, registrar-lock and nameserver-redundancy signals.
https://email-dns-preflight-x402.copper-crate.workers.dev/v1/domain/preflight