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Email Address Verification API
x402
Email Address Verification API is a paid API for AI agents from vmi3089643.contaboserver.net, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-15).
Verifies an email address by checking syntax validity, domain existence, MX records, disposable provider status, free provider detection, and returning a deliverability score
Price / call$0.002
Success—
StatusUnknown
How this service works
Pay-per-call crypto technical analysis for AI agents (x402, USDC on Base). Daily trend regime, Donchian levels, ATR stops, signals and backtests computed with the code of a live trend-following bot from Binance spot klines.
Output
Returns a JSON object with the original email, domain, a boolean for syntax validity, a boolean for MX record presence, a boolean for disposable provider, a boolean for free provider (e.g. Gmail/Yahoo), and a numeric deliverability score between 0 and 1.
Example use cases
Block disposable emails at signup
“Before I add this new user to my list, check if 'user123@mailinator.com' is a disposable or throwaway email address and give me a deliverability score so I can decide whether to block the registration.”
Clean a marketing email list
“I need to validate 'contact@acmecorp.io' — does it have valid syntax, a real domain with MX records, and is it from a legitimate non-free business email provider?”
Flag suspicious lead form submissions
“Someone submitted 'fakeuser@guerrillamail.com' through our lead form — can you verify whether this email is from a disposable provider or is otherwise low-quality so I can decide whether to follow up?”
Technical details
Endpoint
GEThttps://vmi3089643.contaboserver.net/v1/email/verifyWhen to prefer
Choose this endpoint when you need a lightweight, pay-per-use email verification check that covers syntax, domain, MX, disposable, and free-provider signals in a single call without a subscription. Ideal for agents doing on-demand single-email validation during lead capture, signup flows, or list hygiene — especially when cost-per-call pricing ($0.002 USDC) is preferable to a monthly SaaS plan.
Side effects
- Missing or malformed email query parameter returns an error
- Non-existent TLD or completely invalid syntax may return syntaxValid: false with score near 0
- DNS lookup timeouts for obscure domains may affect MX record accuracy
- Edge cases with new disposable provider domains not yet in database may not be flagged
- Payment failure via x402 protocol blocks the request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"email": "name@example.com",
"hasMx": false,
"score": 0.2,
"domain": "example.com",
"disposable": false,
"syntaxValid": true,
"freeProvider": false
}
}Tags
x402
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