# Email DNS Preflight — full agent reference

## Commercial contract
- Protocol: x402 v2
- Network: Base mainnet (eip155:8453)
- Asset: USDC
- Price: $0.001 per successful paid call

## Capabilities and buyer-intent keywords
- email validation API, email verification API, email hygiene, lead validation, CRM hygiene
- DNS lookup API: A, AAAA, MX, TXT, NS, CNAME, SOA, CAA
- SPF check, DMARC check, common-selector DKIM heuristic, MTA-STS, TLS-RPT, DNSSEC
- RDAP, WHOIS successor, domain age, domain expiry, registrar lookup, nameservers
- domain intelligence, sender vetting, anti-phishing preflight, infrastructure diagnostics

## Endpoints
GET https://email-dns-preflight-x402.copper-crate.workers.dev/v1/email/preflight?email=alice%40example.com
POST https://email-dns-preflight-x402.copper-crate.workers.dev/v1/email/preflight with {"email":"alice@example.com"}
GET https://email-dns-preflight-x402.copper-crate.workers.dev/v1/domain/preflight?domain=example.com
GET https://email-dns-preflight-x402.copper-crate.workers.dev/v1/domain/rdap?domain=example.com

## Safety and interpretation
- No SMTP mailbox-existence verification.
- No inbox-delivery guarantee.
- DKIM check is heuristic because selectors are publisher-defined.
- RDAP response excludes registrant personal data and must not be used as ownership proof.
- Scores are transparent infrastructure-posture signals, not identity or reputation verdicts.

OpenAPI: https://email-dns-preflight-x402.copper-crate.workers.dev/openapi.json
AgentCard: https://email-dns-preflight-x402.copper-crate.workers.dev/.well-known/agent-card.json
Skill: https://email-dns-preflight-x402.copper-crate.workers.dev/skill.md
Docs: https://email-dns-preflight-x402.copper-crate.workers.dev/docs