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Email Address Validation and Domain Mail Check
x402
Email Address Validation and Domain Mail Check is a paid API for AI agents from domain-dns.x402tookit.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-25).
Validates an email address for syntax correctness, domain MX record existence, role account status, and disposable domain detection.
Price / call$0.03
Success—
StatusUnknown
How this service works
Email address screen: syntax, whether its domain accepts mail (MX), role account and known disposable domain flags.
Output
Returns a structured verdict including: whether the email syntax is valid, whether the domain exists and has MX records, whether it is a null-MX or implicit-MX domain, whether the address is a role account (e.g. admin@, info@), whether the domain is a known disposable provider, a human-readable summary and list of reasons, and a timestamp indicating data freshness.
Example use cases
Signup form email screening
“Before we accept this registration, check if the email address user@guerrillamail.com is deliverable — flag it if it's disposable or a role account, and verify the domain actually accepts mail.”
CRM lead quality check
“I have a new lead who gave us sales@somedomain.biz — can you verify whether that email address is syntactically valid, whether the domain has MX records, and whether it's a role-based address?”
Bounce prevention before bulk send
“We're about to send a campaign to noreply@example.net — can you quickly screen that email address to see if it passes syntax checks, has working mail servers, and isn't a disposable or role-based inbox?”
Technical details
Endpoint
GEThttps://domain-dns.x402tookit.com/email-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a combined, single-call check of email syntax, domain MX availability, role account detection, and disposable domain flagging — rather than calling separate DNS lookup and syntax validation tools individually. Ideal for pre-signup screening, lead validation, or bounce prevention workflows where you need a clear pass/fail verdict with reasons.
Side effects
- Missing 'email' query parameter returns an error
- Malformed email string may return syntaxValid=false with no further checks
- DNS lookup failures may degrade MX resolution results with degraded=true
- Unknown or very new domains may have incomplete RDAP/DNS data
- Disposable domain lists may not be exhaustive for newly created throwaway services
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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