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Contact Verify

https://verify-x402.okwithit9.workers.dev/verify/email
● healthy search

Pay-per-call email and phone verification for AI agents. Real mailbox-level email verification (SMTP-level deliverability, catch-all, disposable, and role detection). Live carrier line-type lookup (mobile, landline, VoIP, toll-free) with E.164 normalization. No signup and no API key. Payment is USDC on Base via x402 exact. Email addresses and phone numbers are not stored. Paid routes return HTT...

Category
search
Chains
base, eip155:8453
Price
$0.0020–$0.0250 USDC

Quality grade

How grading works
B 71.9 / 100
Availability 40.0 / 40
Endpoint responded (HTTP 402)
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 11.9 / 40
6 distinct payers, 20 USDC transfers in the last 30 days
Owner verified 0.0 / 3
Nobody has claimed this listing yet
Endpoint last checked 5 h ago. On-chain activity last read 2 d ago. Availability and on-chain demand are both re-probed daily; the grade updates automatically on the next pass. This grade sets search order and leaderboards; the readiness score below is shown for reference only.

x402 readiness

B · 87/100

Readiness is how fully this listing follows its protocol and how it behaved in our probes over 30 days. It is shown for reference and does not move it in search. Search order and leaderboards use the separate quality grade (here B, 71.9/100), which weighs availability, payability and on-chain demand. How the two differ

Valid payment requirements 10/10 Payment requirements carry a payee, a mainnet network and a price.
Live 402 challenge 25/25 Paid endpoint answers with an HTTP 402 challenge (360 ms).
x402 version n/a x402 version not observed yet.
Signed descriptor n/a No x402 standard defines a signed descriptor.
Uptime (30 days) 10.31/15 22/32 probes succeeded over 30 days (69%).
Resource declaration 10/10 Declares 6 paid resource(s).
Verified identity 5/10 Publisher descriptor (/.well-known/x402 or OpenAPI) on record; claim this listing to verify domain control.
Freshness + modern flags 5/5 seen in a source within 7 days; declares x402.
Security declaration n/a Payment is the access control for an x402 resource.
Applicable criteria total 75 points, scaled to 100.
Responsiveness: Responsive (360 ms; bands ≤2.5 s, ≤5 s, ≤8 s, slower; penalty only).
Payment evidence: x402_challenge — We sent a request and got a live HTTP 402 challenge. Also: x402_manifest, catalog_listing. Qualifies the payment claim; adds no points.
Measured 2026-11-11.
Nine criteria, the same as the A2A readiness score, read from our daily probe of the paid endpoint, its payment requirements and 30-day probe history. Signed descriptor and security declaration are n/a for x402 (payment is the access control), as is an x402 version we have not observed; the remaining points are scaled to 100. Grades: A>=90, B>=75, C>=60, D>=40, F<40. Display only: search order uses the quality grade.

Compared with peers

Against 10,060 reachable x402 APIs in our daily snapshot (2026-11-12 01:39 UTC). Display only; it does not change search order.

Readiness
Higher than 76% of peers
This listing 87 · peer median 78
Latency
Faster than 30% of peers
This listing 360 ms · peer median 205 ms

Where it loses the most points, and how to win them back

  • Verified identity −5 — Claim the listing and prove control of its domain.
    Now: Publisher descriptor (/.well-known/x402 or OpenAPI) on record; claim this listing to verify domain control.
  • Uptime (30 days) −4.7 — Stay reachable in our daily probes.
    Now: 22/32 probes succeeded over 30 days (69%).

How many agent tools actually work · All statistics

Paid endpoints

6 resource(s) advertised by this origin. Each price below is that resource's own x402 price; the headline price is the range across them.

POST https://verify-x402.okwithit9.workers.dev/verify/email $0.0100 / call

Contact Verify (verify-x402) full check: a real mailbox check at $0.01 (SMTP deliverability, disposable, catch-all, and role). Use before sending, for lead lists, CRM cleanup, and sign-up fraud checks.

POST https://verify-x402.okwithit9.workers.dev/verify/phone $0.0200 / call

Contact Verify (verify-x402) phone lookup: carrier line type (mobile, landline, VoIP, toll-free) and E.164 format. Detect VoIP/burner numbers in sign-up fraud checks; confirm SMS-capable mobiles. $0.02.

POST https://verify-x402.okwithit9.workers.dev/verify/email/batch $0.0100 / call

Contact Verify (verify-x402) batch: the full $0.01 mailbox check for up to 50 addresses. The HTTP 402 amount is 10000 atomic units times the number of unique, well-formed addresses. Invalid syntax is not billed. A finished check can be status unknown. If any address cannot be checked, the response i

POST https://verify-x402.okwithit9.workers.dev/verify/email/basic $0.0020 / call

Contact Verify (verify-x402) basic check: $0.002 (2000 atomic units) for format plus mail server. Syntax, MX, disposable, free-email, and role account. mailbox_checked is false. It does not check the mailbox. The full real mailbox check is POST /verify/email at $0.01.

GET https://verify-x402.okwithit9.workers.dev/verify/domain $0.0200 / call

Contact Verify (verify-x402) domain check: domain age, lookalike and typosquat detection against a known domain, MX match, live website, business-registry match, free and disposable sender flags, and SPF/DMARC. Returns low_risk, medium_risk, or high_risk with reasons. $0.02. If registration data or

POST https://verify-x402.okwithit9.workers.dev/verify/sender $0.0250 / call

Contact Verify (verify-x402) sender check: email deliverability plus the domain check in one call. $0.025. If the mailbox check does not complete, or registration data or DNS cannot be read, payment is not settled.

How to call

cURL · x402-fetch / x402-axios will auto-handle 402
curl -sS -i -X POST https://verify-x402.okwithit9.workers.dev/verify/email  # expect HTTP 402 Payment Required (about $0.002/call)
/.well-known/x402.json
https://verify-x402.okwithit9.workers.dev/.well-known/x402

Listed in

Directories this entry was found in.

x402scan since 2026-10-13