Skill: Contact verification
Verify an email address is deliverable - syntax validation plus MX record check on the domain. Contact verification skill pack: one x402 payment runs 3 underlying tools (email-validate, dns-lookup, spf-check); partial-success per step.
Go to this service →Our latest check (2026-10-11)
- Answering
- Yes — valid x402 payment terms
- Time to answer
- 201 ms
- Price
- $0.004 per call
- Paying buyers, last 30 days
- 3 (directory's own records)
- Paid calls, last 30 days
- 4
- Category
- DNS and domains
- Address
- https://agent402.tools/api/skill/contact-verify
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/781760762dc0.json. Paid lookup by address: GET /api/seller?resource=… ($0.001, x402).