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HALOWERK buerowerk – Per-Domain Email Import Quota Filter
x402
HALOWERK buerowerk – Per-Domain Email Import Quota Filter 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).
Filters a list of email addresses so that no single domain exceeds a specified maximum count, enforcing per-domain import quotas.
Price / call$0.004
Success—
StatusUnknown
How this service works
HALOWERK buerowerk — bezahlte Endpunkte nach x402. Preise in USDC auf Base Mainnet.
Output
A processed JSON response indicating which email addresses passed the per-domain quota filter, effectively returning a trimmed list where each domain is represented by at most the specified maximum number of addresses.
Example use cases
Fair-distribution mailing list preparation
“I've got 500 raw email addresses for our newsletter launch but I don't want any one company to dominate the list — filter it so each domain appears at most 20 times.”
CRM import domain cap enforcement
“Before we import these 400 contacts into the CRM, make sure no single email domain has more than 5 entries — here's the full list.”
Preventing single-org signup spam
“We collected sign-up emails from our webinar and suspect one organization bulk-registered — cap it at 3 addresses per domain and give me the cleaned list.”
Technical details
Endpoint
POSThttps://buero.halowerk.com/v1/baumarkt/mail/per-domain-import-quota?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a lightweight, paid-per-call microservice to enforce per-domain caps on email lists before import or mailing — particularly useful in automated pipelines where fairness or anti-spam constraints must be applied server-side without building custom filtering logic.
Side effects
- Empty emails array returns validation error
- max_per_domain below 1 or above 500 returns schema violation
- emails array exceeds 500 items returns rejection
- Malformed email strings may be rejected or silently skipped
- Payment failure over x402 protocol returns 402 with payment details
- Network timeout on large lists
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| emails | array | |
| max_per_domain | integer |
Output
Schema · Response
{
"type": "json"
}Tags
x402
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