x402 census · mailcheck.hugen.tokyo · a1494fd72306 · JSON
POST /mailcheck/validate
method-gated
6 email validation checks in one call — syntax (RFC 5322), MX record verification, disposable detection (5,000+ domains), free provider identification, role-based address detection (admin@, info@), and typo suggestion. Returns a 0-1 confidence score with detailed per-check results. POST method protects email addresses from access logs. No API keys, no multiple service integrations needed. Accepts…
Verdict: not verified by an unpaid GET. 405/400: the 402 sits behind the declared method. This says nothing about whether the route works when called as declared.
Facts from the catalogs
| Field | Value |
|---|---|
| URL | https://mailcheck.hugen.tokyo/mailcheck/validate |
| Method | POST |
| Price | $0.01 USDC = 10000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 |
| Network | eip155:8453 (base); also accepts solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| payTo | 0x29322Ea7EcB34aA6164cb2ddeB9CE650902E4f60 |
| Seller | mailcheck.hugen.tokyo |
| Catalogs | cdp (row updated 2026-09-29) |
| Listed since (lower bound) | 2026-09-29 (earliest catalog timestamp; catalogs report last-update times only) |
| Last catalog update | 2026-09-29 |
| CDP quality counters | 27 calls and 3 unique payers in 30 days, last call 2026-09-29 (catalog-reported, not verified on chain) |
| Category (keyword rule) | chain-rpc |
| Templated path | no |
| x402Version in catalog | 2 |
| Service name / tags | none |
Unpaid probe (census of )
| Field | Value |
|---|---|
| Probe | not probed in this build |
Latest re-probe
| Field | Value |
|---|---|
| Re-probed at | 2026-10-01T12:13:42.000Z (cron) |
| Verdict now | method-gated changed from unprobed |
| HEAD / GET | 405 / 405 |
| accepts[0] | none |
| Live amount equals catalog price | not comparable |
| Latency | 1,174 ms |
| Error | none |
On-chain facts for the payTo (public address)
| Field | Value |
|---|---|
| Distinct payers | 109 |
| Payments | 506 |
| USDC volume | $20.91 |
| Median payment | $0.01 |
| First / last payment | 2026-06-12 / 2026-09-30 |
| Sampler-shaped share of payments | 100.0% |
| Payers that are not samplers | 0 |
| Source | forensics-2026-09-30 |
| Address | 0x29322Ea7EcB34aA6164cb2ddeB9CE650902E4f60 |
Declared input and output (extensions.bazaar)
{
"input": {
"bodyType": "json",
"example": {
"email": "user@gmail.com"
},
"method": "POST",
"type": "http"
},
"output": {
"type": "json",
"example": {
"checks_performed": [
"syntax",
"mx",
"disposable",
"free",
"role",
"typo"
],
"did_you_mean": null,
"domain": "gmail.com",
"email": "user@gmail.com",
"is_disposable": false,
"is_free": true,
"is_role_based": false,
"mx_found": true,
"mx_records": [
"gmail-smtp-in.l.google.com"
],
"score": 0.95,
"status": "valid",
"syntax_valid": true
}
}
}
Try it (unpaid: shows the 402)
curl -si -X POST 'https://mailcheck.hugen.tokyo/mailcheck/validate' -H 'accept: application/json' -H 'content-type: application/json' --data '{}'
The catalog declares POST. A 402 answer carries the payment requirements in the JSON body and, for x402 v2, base64 in the PAYMENT-REQUIRED header. This page never sends a payment.
Paid checks (x402, USDC on Base)
GET https://bazaar.agentexchange.work/r/a1494fd72306/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"a1494fd72306"} places this resource at the top of the report and search pages for 30 days for $1.00, labelled. Unpaid requests answer 402 with the terms. Pricing.
Catalog references: agentic.market (CDP Bazaar front end) · this record as JSON · all resources on mailcheck.hugen.tokyo.