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Email Validation API
x402
Email Validation API is a paid API for AI agents from golf-evm-math.x402-evm-math.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-29).
Validates an email address by checking syntax, MX records, SPF/DMARC records, and detecting disposable or role-based addresses to return a deliverability verdict — without sending any mail.
Price / call$0.005
Success—
StatusUnknown
How this service works
Exact EVM address, calldata, Uniswap V2/V3 and impermanent-loss math. Pay per call in USDC on Base via x402.
Output
Returns a JSON object with boolean fields: validSyntax (syntax check passed), acceptsMail (domain MX record found), hasSpf (SPF record present), hasDmarc (DMARC record present), and a verdict string (e.g. 'likely-deliverable') summarizing overall deliverability assessment.
Example use cases
Screen sign-up form email inputs
“Before I add this user to my database, check if the email address they submitted — newsletters@tempmail.org — is valid, has proper MX records, and isn't a disposable or role address.”
Pre-flight check before cold outreach
“I'm about to send a sales email to cfo@bigcorp.com — can you verify it's syntactically correct, the domain accepts mail, and it has SPF and DMARC set up so my messages won't bounce?”
Audit email list for bad addresses
“I have a contact email address marketing@fakedomain.xyz I'm not sure about — can you run a full deliverability check on it including MX lookup and disposable address detection without actually sending anything?”
Technical details
Endpoint
GEThttps://golf-evm-math.x402-evm-math.workers.dev/email?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, no-send email deliverability check that combines syntax validation, DNS/MX record lookup, SPF/DMARC checks, and disposable/role address detection in a single API call. Ideal for pre-screening sign-up form inputs, cleaning email lists before outreach, or risk-scoring contact data. Prefer it over sending a test message when you need a passive, non-intrusive check.
Side effects
- Missing or malformed email query parameter — returns an error response
- Domain does not exist or has no MX records — acceptsMail returns false
- DNS lookup timeout for MX/SPF/DMARC records — may return partial results or error
- Invalid email syntax — validSyntax returns false with a low-confidence verdict
- Payment not provided or insufficient — 402 Payment Required response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"hasSpf": true,
"verdict": "likely-deliverable",
"hasDmarc": true,
"acceptsMail": true,
"validSyntax": true
}
}Tags
x402
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