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toolcall.click Email Validate
x402
toolcall.click Email Validate is a paid API for AI agents from toolcall.click, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-14).
Checks an email address for syntax validity, MX record existence, disposable-domain status, role-account and free-provider flags, and returns a deliverability risk verdict without sending any email.
Price / call$0.004
Success—
StatusUnknown
How this service works
Email verification and deliverability check without sending anything: syntax, MX records, disposable-domain detection (121k+ known domains), role-account and free-provider flags. JSON verdict with a bounce/deliverability risk level. Validate emails for signup fraud prevention, list hygiene and lead qualification. $0.004 USDC per call, pay via x402, no API key.
Output
A JSON object containing a deliverability verdict with a bounce/risk level, plus individual flags: syntax valid/invalid, MX record found/not found, whether the domain is in the 121k+ disposable-domain blocklist, whether it's a role account (e.g. info@, support@), and whether it belongs to a free email provider.
Example use cases
Example prompt
“Can you check whether john.doe@example.com is a real, deliverable email address — flag if it's disposable, a role account, or has no valid MX records?”
Technical details
Endpoint
GEThttps://toolcall.click/t/email/validateWhen to prefer
Use this endpoint when you need a lightweight, no-send email validation that covers syntax, DNS/MX infrastructure, and social signals (disposable, role, free-provider) in a single call. Prefer it over full email ping/SMTP verification when you cannot send test messages, need instant results at signup, or want to avoid SMTP-based rate limits and blocklisting. Ideal for signup fraud prevention, list hygiene before campaigns, and lead qualification pipelines.
Side effects
- Missing 'email' query parameter returns an error response
- Malformed email string may still pass syntax check depending on permissiveness
- Unknown or newly created disposable domains may not yet appear in the blocklist
- Private or unusual TLDs may cause MX lookup failures unrelated to deliverability
- Network timeouts on DNS lookups could cause delayed or failed responses
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"risk": "high",
"role": false,
"email": "user@example.com",
"hasMx": false,
"reasons": [
"no_mx"
],
"disposable": false,
"syntaxValid": true,
"freeProvider": false
}
}Tags
x402
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