Email address check for one address: RFC 5322 syntax, MX records (null MX noted)...
https://horizonpulse.dev/api/email/checkOverview
Email address check for one address: RFC 5322 syntax, MX records (null MX noted), SPF and DMARC records over DNS, role-account flag (info@, admin@ and similar) and a disposable-domain match. No SMTP connection is made, so mailbox existence is not checked. One address per call. Bad input or DNS failure: Not charged. USDC on Base or Polygon.
Protocol
x402
Price
$0.0030
Payment Asset
USD Coin
Payment Network
eip155:8453
Category
uncategorized
Provider
horizonpulse
Source
bazaar
Indexed
2026-11-09 04:07:46
Health
Status
unknown
Latency (p50)
—
Uptime (30d)
—
Reliability Score
—
Last Checked
Never
Last Healthy
Never
Consecutive Failures
0
x402 Payment Validation
Payment Requirements
—
Asset Verified
—
Facilitator
—
Input Schema
{
"method": "GET",
"queryParams": {
"email": "example@example.com"
},
"type": "http"
}
Output Schema
{
"example": {
"acceptsMailByDns": true,
"attribution": "<attribution>",
"charging": "Only a successful answer is charged; bad input or a DNS failure is not charged.",
"disclaimer": "<disclaimer>",
"disposable": {
"listed": false,
"matched": null
},
"dmarc": {
"policy": null,
"present": false,
"record": null
},
"domain": "example.com",
"domainUnicode": "example.com",
"email": "example@example.com",
"local": "example",
"mx": [
{
"exchange": "<mx host>",
"priority": 0
}
],
"nullMx": false,
"observedAt": "<ISO 8601 time>",
"ok": true,
"priced": {
"amountAtomic": "<atomic USDC>",
"amountUsd": "<price>",
"asset": "<USDC on Base>",
"network": "base",
"payTo": "<payTo>"
},
"receipt": {
"amountAtomic": "<atomic USDC>",
"id": "hpr_<id>",
"route": "/api/email/check",
"tier": "base"
},
"roleAccount": false,
"smtpChecked": false,
"source": "dns",
"spf": {
"all": null,
"multiple": false,
"present": false,
"record": null
},
"syntax": {
"standard": "RFC 5322 addr-spec (dot-atom subset)",
"valid": true
}
},
"type": "json"
}