HALOWERK buerowerk — Blocked Domain Email Filter

Use this endpoint when you need to programmatically screen a batch of email addresses against a custom or curated list of blocked domains — for example, to enforce signups from business emails only, filter out disposable email providers, or apply compliance-driven domain bans. Prefer this over client-side filtering when you need a consistent, server-enforced blocklist applied across multiple services.

• Missing or malformed emails array returns a validation error
• Missing or empty blocked_domains list may result in no matches being returned
• Invalid email format in the input list may cause parsing errors
• Payment failure via x402 protocol returns HTTP 402 before processing
• Empty input arrays may return an empty result set without error