Resolve402
Email pre-check with a 0-100 deliverability score and its reasons, without SMTP: syntax, MX (incl. null MX), mail provider (Google, Microsoft 365, OVH...), SPF, DMARC, disposable, free webmail, role account, random-looking local part. Mailb
Go to this service →Our latest check (2026-10-11)
- Answering
- Yes — valid x402 payment terms
- Time to answer
- 55 ms
- Price
- $0.003 per call
- Paying buyers, last 30 days
- 4 (directory's own records)
- Paid calls, last 30 days
- 7
- Category
- DNS and domains
- Address
- https://resolve402.dev/api/verify-email
Accuracy
Accuracy scores are published once a seller has enough paid checks against an independent record (at least 7 scored answers over at least 7 days). Until then no score is shown, and a missing score is never a pass.
For agents
This page as JSON: /sellers/42eafce75b53.json. Paid lookup by address: GET /api/seller?resource=… ($0.001, x402).