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Domain Format Check for Email Operations
x402
Domain Format Check for Email Operations 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).
Validates that a hostname has correct public-domain syntax and normalizes internationalized domain names (IDNs); uses DNS data only and does not send email or verify inbox existence.
Price / call$0.01
Success—
StatusUnknown
How this service works
Domain format check for Email operations: Check a hostname for valid public-domain syntax and normalize IDNs. DNS data only; does not send email or verify that an inbox exists.
Output
Returns whether the provided hostname passes valid public-domain syntax rules and, for internationalized domain names (IDNs), the normalized (ACE/Punycode) form. Does not perform inbox verification or send any email — DNS-level format checking only.
Example use cases
Pre-send email domain validation
“Before I send out this bulk email campaign, can you check that 'münchen-marketing.de' has a valid public-domain format and normalize it if it's an internationalized domain?”
User registration input validation
“A user just signed up with the email domain 'xn--nxasmq6b.com' — can you verify whether that's a syntactically valid public domain and what its normalized form looks like?”
CRM data cleanup for email domains
“I'm cleaning up our contact database and want to check if 'payroll.corp.內部' is a properly formatted public domain name before we use it in email workflows.”
Technical details
Endpoint
POSThttps://market.datapackvibe.com/x402/demand-domain-domain-format-email-operations?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to validate that a domain string is syntactically correct as a public domain and/or normalize an IDN to its ASCII-compatible encoding (Punycode) — especially as a lightweight pre-flight check before attempting email delivery or storing domain data. Do not use this if you need to verify that a specific inbox or mailbox exists, check MX records, or actually send an email.
Side effects
- Invalid or malformed domain string returns a syntax error or invalid flag
- Private/reserved domains (e.g. localhost, .local, .internal) may be flagged as non-public
- Extremely long domain labels or TLDs may fail length validation
- Network or service unavailability returns a 402 or 5xx error
- Empty or missing domain field returns a validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| domain | string | Public DNS domain, e.g. example.com. |
Tags
x402
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