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Toll402 Email Verifier
x402
Toll402 Email Verifier is a paid API for AI agents from toll402.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Validates an email address for syntax, MX/A DNS records, disposable-domain, free-provider, and role-account status, returning a 0-100 quality score.
Price / call$0.001
Success—
StatusUnknown
How this service works
The OpenRouter for AI-agent tools: one gateway, one wallet, every capability. Built-in tools, forged tools, a global verified business directory and 2,000+ aggregated x402 services, all paid per call in USDC via x402 (HTTP 402). No signup, no API key.
Output
Returns a JSON object with: the original email string, a boolean `valid` flag, a boolean `hasMx` indicating DNS MX record presence, a boolean `disposable` flag for throwaway domains, a boolean `roleAccount` flag for addresses like info@ or noreply@, an integer `score` from 0-100 representing overall quality, plus response time in milliseconds and a `ok` status flag.
Example use cases
Block disposable emails at signup
“Before I create an account for the user, check if the email they gave me — dropbox123@mailinator.com — is a disposable or throwaway address so I can reject it.”
Pre-send deliverability check
“I'm about to send a marketing email to newsletter@example.org — can you verify it has valid MX records and isn't a role account before I send?”
Lead quality scoring
“Score the email quality of ceo@bigcorp.com for me — I want to know if it's syntactically valid, has a working mail server, and what the overall 0-100 quality score is.”
Technical details
Endpoint
GEThttps://toll402.dev/v1/email/verifyWhen to prefer
Choose this endpoint when you need a fast, low-cost ($0.001 per call) single-email verification that combines syntax checking, live DNS MX/A record lookup, disposable-domain detection, free-provider identification, and role-account flagging in one call with a composite quality score. Prefer it over heavier email validation services when you want a simple pay-per-use model without subscription overhead, and when you need the combined signal rather than just syntax or just deliverability alone.
Side effects
- Invalid or missing email parameter returns an error response
- Malformed email syntax (too short, missing @) may return valid=false with low score
- DNS lookup timeouts may cause hasMx to be false even for legitimate domains
- Very new domains may have incomplete DNS propagation, yielding incorrect MX results
- Email addresses at the maximum 254-character length may have edge-case handling
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"email": "support@github.com",
"hasMx": true,
"score": 95,
"valid": true,
"disposable": false,
"roleAccount": true
}
}Tags
x402
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