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Surefact Email Verification
x402
Surefact Email Verification is a paid API for AI agents from api.surefact.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-14).
Checks an email address for deliverability, typos, disposability, role-account status, and DNS validity, returning a verdict with reasons.
Price / call$0.005
Success—
StatusUnknown
How this service works
Verified, pay-per-call tools for AI agents: read web pages, check emails, audit DNS and domains, convert currencies, vet package versions for vulnerabilities, and roll provably fair dice for games. Every answer is checked against its source or comes with a proof. No signup or API key: pay each call in USDC on Base with x402. Failed calls are never charged.
Output
Returns a JSON object with: a verdict string (e.g. 'valid', 'risky', 'invalid'), an array of human-readable reasons, a did_you_mean typo suggestion, boolean flags for disposable/role_account/free_provider, MX record presence, domain age in days, sender authentication info, and whether the mailbox was directly checked.
Example use cases
Catch typos in signup forms
“A user just signed up with the email jsmith@yahooo.com — can you verify it and tell me if there's a typo in the domain before I send a welcome email?”
Block disposable emails from free trial
“Check whether temp-inbox@mailnull.com is a disposable or throwaway email so I can decide whether to block it from my free trial signup.”
Pre-send deliverability audit
“Before I launch this email campaign, verify that contact@acme-corp.net actually has working MX records and can receive mail.”
Technical details
Endpoint
GEThttps://api.surefact.workers.dev/v1/email?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a verified, source-checked email validation with detailed deliverability signals (MX, typo detection, disposable flag, domain age) and pay-per-call pricing with no signup. Prefer it over bulk validation services when checking individual addresses in real time, especially when you need typo suggestions and domain audit details bundled in one response.
Side effects
- DNS unreachable for the domain — returns verdict 'risky' with a reason explaining DNS failure
- Invalid email format — likely returns an error or invalid verdict
- Network timeout reaching mail servers — mailbox_checked will be false
- Payment failure — call is not charged if the API returns a non-200 response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"mx": null,
"domain": "gmial.com",
"has_mx": null,
"address": "jane@gmial.com",
"reasons": [
"the domain's DNS servers can't be reached, so mail can't be delivered right now",
"possible typo: did you mean gmail.com?"
],
"verdict": "risky",
"disposable": false,
"sender_auth": null,
"did_you_mean": "jane@gmail.com",
"role_account": false,
"free_provider": false,
"mail_provider": null,
"domain_age_days": 8554,
"mailbox_checked": false
}
}Tags
x402
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