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Agent Tools Email Validation
x402
Agent Tools Email Validation is a paid API for AI agents from agents.crowdspark.me, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-31).
Validates an email address by checking syntax, MX records, disposable/temporary domain status, role address type, and free provider classification to return a deliverable guess.
Price / call$0.001
Success—
StatusUnknown
How this service works
Pay-per-call utilities for AI agents over x402, USDC on Base.
Output
A JSON object containing the original email and domain, a boolean for valid_syntax, has_mail_server, disposable, role_account, and free_provider flags, a list of mx_records strings, and a deliverable_guess field (e.g. 'likely', 'unlikely', 'unknown') summarizing overall deliverability without performing an SMTP probe.
Example use cases
Signup form disposable email filter
“Before creating an account for this user, check whether their email address temp-user-92847@mailinator.com is a disposable or throwaway address — I don't want fake signups getting through.”
CRM lead list quality check
“I'm about to import a list of leads and the first one is vpsales@outlook.com — can you tell me if it's a role account, a free provider, and whether it looks deliverable before I add it to our CRM?”
Pre-send campaign email audit
“We're about to send a marketing email to contact@bigcorpinc.com — can you verify the domain has active MX mail servers and give me a deliverable guess so I know it won't bounce?”
Technical details
Endpoint
GEThttps://agents.crowdspark.me/v1/email/check?utm_source=zero.xyzWhen to prefer
Prefer this endpoint when you need a fast, privacy-safe email quality check without performing an SMTP handshake — ideal for signup validation, CRM hygiene, or lead list screening where you need disposable domain detection, role address flagging, and MX verification in a single call. Choose the sibling 'email risk check' endpoint if you also need sender domain age, registrar, and WHOIS intelligence in the same response.
Side effects
- Missing or malformed email query parameter returns a 400 error
- Non-existent TLD or completely malformed address yields valid_syntax: false with no MX data
- Domain with no DNS records returns has_mail_server: false and deliverable_guess: unlikely
- Temporary DNS outages may cause mx_records to be empty even for real domains
- Free provider domains (gmail.com, yahoo.com) correctly set free_provider: true, which may be unexpected
- Payment not included or insufficient returns a 402 Payment Required response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"email": "jane@acme.com",
"domain": "acme.com",
"disposable": false,
"mx_records": [
"10 mx1.acme.com."
],
"role_account": false,
"valid_syntax": true,
"free_provider": false,
"has_mail_server": true,
"deliverable_guess": "likely"
}
}Tags
x402
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