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Email Address Validation
x402
Email Address Validation is a paid API for AI agents from bess-x402.onrender.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-28).
Validates an email address for syntax, domain/MX records, disposable provider, role address, free provider, and typo detection — without sending mail or probing the mailbox.
Price / call$0.003
Success—
StatusUnknown
How this service works
Check an email address before sending: syntax, whether the domain exists and has mail servers (MX), disposable/temporary provider, role address (info@, sales@), free provider and typo suggestion (gmial.com -> gmail.com), with a verdict. No mail is sent and the mailbox is not probed.
Output
Returns a structured verdict including: syntax validity, domain existence and MX record presence, whether the address belongs to a known disposable/temporary provider, whether it is a role address (e.g. info@, admin@), whether it uses a free provider (e.g. Gmail, Yahoo), a typo suggestion if the domain looks misspelled, and an overall deliverability verdict — all without sending any email or probing the mailbox.
Example use cases
Pre-send email list cleanup
“I'm about to send a campaign to user@tempmail.org — can you check if that email is from a disposable provider, has valid MX records, and give me an overall verdict on whether I should send to it?”
Signup form email quality gate
“A user just signed up with info@bigcorp.com — validate that email and tell me if it's a role address, whether the domain actually accepts mail, and if the syntax is correct so I can decide whether to flag it for review.”
Typo correction at point of entry
“Someone entered their email as jane.smith@yahooo.com — can you check that for typos and tell me what the correct address might be, plus whether the domain has mail servers?”
Technical details
Endpoint
GEThttps://bess-x402.onrender.com/v1/web/email-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, passive email quality check before sending — especially to catch typos, disposable providers, and role addresses without triggering any mail delivery or SMTP probing. Prefer it over SMTP-probing validators when you want zero side effects and don't need mailbox-existence confirmation.
Side effects
- Missing or malformed email parameter returns a validation error
- Domain exists but has no MX records — flagged but not an API error
- Extremely obscure TLDs or new domains may not be in disposable provider lists
- Rate limiting or service unavailability on the hosted Render instance may return 5xx errors
- Unicode/internationalized email addresses may not be fully supported
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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