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Email Syntax and Domain Structure Validator
x402
Email Syntax and Domain Structure 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 whether an email address has valid syntax and domain formatting without sending email or verifying mailbox existence.
Price / call$0.01
Success—
StatusUnknown
How this service works
Email structure check for Email operations: 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 structural analysis of the email address indicating whether the syntax (local part, @ symbol, domain) is correctly formed and whether the domain portion follows valid formatting rules. Does not confirm mailbox existence or perform DNS MX record lookups to verify deliverability.
Example use cases
Form input validation before signup
“Before we store this new user registration, can you check that 'john_smith@mycompany.org' is a properly structured email address with valid syntax and domain format?”
Bulk email list pre-screening
“I've got a list of email addresses from an import and I want to flag any that have broken syntax or malformed domains — can you start by checking 'bad-email@.nodomain' to see what the structure check returns?”
Data pipeline quality gate
“We're ingesting contact records from a third-party source. Can you validate that 'contact@sub.domain.co.uk' has correct email structure and domain formatting before we pass it downstream?”
Technical details
Endpoint
POSThttps://market.datapackvibe.com/x402/demand-domain-email-structure-check-email-operations?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, lightweight check that an email string is structurally valid before storing it, sending to it, or passing it to another system — and you do not need to confirm deliverability or mailbox existence. Ideal for form validation, data pipeline quality gates, and pre-filtering obviously malformed addresses at low cost ($0.01/call).
Side effects
- Malformed or missing email field in request body returns a validation error
- Completely absent input may result in a 400 bad request
- Edge-case international or Unicode email addresses may produce unexpected results
- Does not detect disposable or temporary email providers
- Cannot confirm whether the domain actually accepts mail
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| string | Email address to inspect. |
Tags
x402
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