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Email Validation — Syntax, MX, and Disposable Domain Check
x402
Email Validation — Syntax, MX, and Disposable Domain Check is a paid API for AI agents from mcpfax-utility.bowling-anthony.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Validates an email address by checking syntax correctness, live MX record deliverability, and whether the domain is a known disposable/throwaway provider.
Price / call$0.005
Success—
StatusUnknown
How this service works
Email validation — Syntax check + live MX/deliverability + disposable-domain flag.
Output
Returns a structured result indicating whether the email passes syntax validation, whether the domain has live MX records (confirming it can receive mail), and whether the domain is flagged as a disposable/throwaway provider — giving a clear deliverability verdict for each check.
Example use cases
Filter fake signups at registration
“Before we store this new user's email 'randomuser@guerrillamail.com', can you validate it — check the syntax, confirm the domain actually receives mail, and flag it if it's a disposable address?”
Scrub a lead list before outreach
“I have a prospect email 'sarah.johnson@bizco.net' — please verify it's syntactically correct, that the domain has working MX records, and that it's not a throwaway address before I add her to our campaign.”
Catch bad emails in a support form
“A user just submitted 'support-request@yopmail.com' through our contact form — can you validate whether that email is real and deliverable, and let me know if it's a known disposable domain?”
Technical details
Endpoint
GEThttps://mcpfax-utility.bowling-anthony.workers.dev/v1/validate-emailWhen to prefer
Choose this endpoint when you need a fast, multi-layered email check combining syntax, live DNS/MX deliverability, and disposable-domain detection in a single call — especially for registration flows, lead enrichment, or outreach list hygiene. Prefer it over simple regex-only validators when you need to know if the domain can actually receive mail, or when filtering out throwaway accounts is important.
Side effects
- Invalid or malformed email input returns a syntax error immediately without MX lookup
- Domain has no MX records — email structurally valid but undeliverable
- MX lookup timeout if the domain's DNS is slow or unresponsive
- Domain is valid but not in the disposable-domain list, potentially missing newer throwaway services
- Network issues on the worker may return 5xx errors
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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