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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 2026-10-27).
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, every capability, pay per call. Built-in tools, agent-forged tools, a global verified business directory, 2,788 provider API endpoints (SEO, social, enrichment, ads, market data, AI generation) and aggregated x402 services. Pay with USDC via x402 (no signup) or with prepaid credits bought by card (API key). Charged only on success.
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/verify?utm_source=zero.xyzWhen 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
Reviews
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