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Email Structure & Domain Format Validator
x402
Email Structure & Domain Format Validator is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-02).
Checks an email address for valid syntax and domain formatting using DNS data, without sending email or verifying mailbox existence.
Price / call$0.01
Success—
StatusUnknown
How this service works
Email structure check for Security review: Check syntax and domain formatting only; it does not test whether a mailbox exists. DNS data only; does not send email or verify that an inbox exists.
Output
Returns a structured result indicating whether the email address passes syntax and domain format checks. Includes whether the local-part and domain are correctly structured per email standards, and DNS-based domain formatting data. Does not confirm mailbox existence or send any email.
Example use cases
Pre-registration email format gate
“Before I save this user's email 'alex_smith@my-startup.io' to the database, check whether its syntax and domain format are structurally valid so I don't store a malformed address.”
Security review of suspicious email input
“A user submitted 'admin@..malicious..com' on our contact form — can you run a structure check on it to see if it's a properly formatted email address or something sketchy?”
Bulk onboarding data quality pass
“I'm reviewing a CSV of imported leads and want to flag bad emails — can you check if 'marketing@corp_enterprise.net' passes email syntax and domain format validation?”
Technical details
Endpoint
POSThttps://market.datapackvibe.com/x402/demand-domain-email-structure-check-security-review?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, lightweight check of email syntax and domain format — for example, before storing user input, during security review of suspicious submissions, or for data-quality passes on imported contact lists. Prefer it over full mailbox-verification services when you do not want to send email or trigger SMTP probes, and when DNS-level domain format validation is sufficient.
Side effects
- Malformed or missing email input returns a validation error
- Non-existent or unreachable DNS domain may cause a lookup failure
- Edge-case email formats (e.g. quoted local parts, internationalized domains) may yield unexpected results
- Payment failure or insufficient funds returns an HTTP 402 error
- Overly long email strings may be rejected
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| string | Email address to inspect. |
Tags
x402
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