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HALOWERK buerowerk — Empty Domain Label Email Review
x402
HALOWERK buerowerk — Empty Domain Label Email Review is a paid API for AI agents from buero.halowerk.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-22).
Validates a batch of email addresses by checking for empty domain label issues (e.g. double dots or leading/trailing dots in the domain part)
Price / call$0.004
Success—
StatusUnknown
How this service works
HALOWERK buerowerk — bezahlte Endpunkte nach x402. Preise in USDC auf Base Mainnet.
Output
A JSON response indicating which of the submitted email addresses contain empty domain label issues (e.g. consecutive dots, leading or trailing dots in the domain portion), allowing the caller to identify and remove or correct malformed addresses.
Example use cases
Pre-send campaign email list cleanup
“Before I send out this marketing email, check these 200 addresses for empty domain label issues so we don't waste sends or hurt our deliverability: [list of emails].”
CRM data quality audit
“I just exported our CRM contacts and I want to make sure none of the email addresses have broken domain labels like double dots or leading dots — can you run them through a check?”
Sign-up form submission validation
“We got a batch of new user registrations overnight — can you scan all their email addresses and tell me which ones have empty domain label errors so I can flag those accounts before activation?”
Technical details
Endpoint
POSThttps://buero.halowerk.com/v1/baumarkt/mail/empty-domain-label-review?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to specifically detect empty domain label defects (double dots, leading/trailing dots in domain segments) in bulk email lists — distinct from general email syntax validation. Ideal for pre-send list hygiene, CRM data quality pipelines, or sign-up validation where RFC-compliant domain labels are critical for deliverability.
Side effects
- Empty emails array — returns validation error
- Email string exceeds 320 character limit — rejected
- Array exceeds 500 items — request rejected
- Malformed JSON body — 400 error
- Payment not attached or insufficient USDC — 402 Payment Required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| emails | array |
Output
Schema · Response
{
"type": "json"
}Tags
x402
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