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HALOWERK buerowerk – Email Domain Underscore Review
x402
HALOWERK buerowerk – Email Domain Underscore Review is a paid API for AI agents from buero.halowerk.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-18).
Analyzes a list of email addresses to review and flag those containing underscores 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 have underscores in their domain segment, likely including a list of flagged emails, their domain portions, and a summary of findings per address or overall.
Example use cases
Mailing list domain hygiene audit
“I have a batch of 200 subscriber emails I'm about to send a campaign to — can you check them all for underscores in the domain portion and tell me which ones are non-standard so I can clean the list first?”
CRM data quality check
“Before we import these 300 contact emails into our CRM, can you scan them for unusual domain formats like underscores after the @ sign so we can catch any data entry errors?”
B2B lead validation before outreach
“We've got a lead list of 150 business email addresses — can you review the domain parts and flag any that contain underscores, since those might bounce or look suspicious to our mail server?”
Technical details
Endpoint
POSThttps://buero.halowerk.com/v1/baumarkt/mail/domain-underscore-review?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to programmatically audit or clean a batch of email addresses specifically for underscore characters in the domain part — particularly useful for CRM hygiene, mailing list validation, or B2B outreach preparation where non-standard domain formats can cause deliverability issues. Prefer this over generic email validation services when underscore-in-domain detection is the primary concern.
Side effects
- Empty or missing emails array returns a validation error
- Emails array exceeds 500 items results in rejection
- Invalid email format strings may be flagged or cause processing errors
- Malformed request body returns a 400 error
- Payment not provided or insufficient USDC results in 402 Payment Required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| emails | array |
Output
Schema · Response
{
"type": "json"
}Tags
x402
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