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Email DNS Preflight

https://email-dns-preflight-x402.copper-crate.workers.dev/v1/email/preflight

● down utility

Pay-per-call email syntax and public DNS/mail posture preflight. No mailbox-level SMTP claim.

Quality grade

How grading works

D 20.0 / 100 capped at D while down

Availability 0.0 / 40

Endpoint did not respond

Payability 20.0 / 20

✓ Answers a real HTTP 402 challenge
✓ Publishes a /.well-known/x402 descriptor
✓ Payment address on record
✓ Settlement network declared
✓ Price declared

Demand 0.0 / 40

0 distinct payers, 0 USDC transfers in the last 30 days

Owner verified 0.0 / 3

Nobody has claimed this listing yet

Endpoint last checked 7 h ago. On-chain activity last read 11 d ago. Availability and on-chain demand are both re-probed daily; the grade updates automatically on the next pass.

Paid endpoints

3 resource(s) advertised by this origin.

POST https://email-dns-preflight-x402.copper-crate.workers.dev/v1/email/preflight

Validate email syntax and public DNS mail-security posture before signup, CRM import, lead outreach or email sending.

GET https://email-dns-preflight-x402.copper-crate.workers.dev/v1/domain/preflight

Resolve A/AAAA/MX/TXT/NS/CNAME/SOA/CAA plus SPF, DMARC, DKIM heuristic, MTA-STS, TLS-RPT, default-selector BIMI, DNSSEC and RDAP age/expiry for a domain.

GET https://email-dns-preflight-x402.copper-crate.workers.dev/v1/domain/email-security

Focused SPF/DMARC/DKIM/BIMI diagnostics with SPF mechanism/DNS-trigger analysis, DMARC enforcement/alignment/reporting metadata, MX provider hints and transparent risk flags.

How to call

cURL · x402-fetch / x402-axios will auto-handle 402

curl -X POST https://email-dns-preflight-x402.copper-crate.workers.dev/v1/email/preflight

/.well-known/x402.json

https://email-dns-preflight-x402.copper-crate.workers.dev/.well-known/x402

Listed in

Directories this entry was found in.

x402scan mcp x402 a2a