Check domain impersonation API

Identify domains resembling supplied company or brand domains using edit distance, hyphen variants, homoglyph folding, and brand-token embedding. Resemblance is not proof of abuse.

The Check domain impersonation operation is part of the Email & Communication Security API on BRAINIAC.software. Identify domains resembling supplied company or brand domains using edit distance, hyphen variants, homoglyph folding, and brand-token embedding. Resemblance is not proof of abuse. It is exposed as POST /api/v1/email-security/domain-impersonation-check and priced at $0.03 USDC on Base. Payment uses the x402 exact scheme: an unpaid call returns HTTP 402 with payment requirements; after paying the exact USDC amount, retry the same request with a payment-signature header and Idempotency-Key. No account and no API key are required. Data sources for this product: Caller-supplied raw email, EML, headers, attachments, URLs, and conversation copies Public DNS TXT when publicDns is requested Public HTTP(S) redirect follows when followPublicUrls is requested Limitations: Messages are never sent and mailboxes are never logged into. Email and attachment bytes are never uploaded to external malware or sandbox scanners. Observed facts are separated from inferred threats. Indicators are not labeled confirmed malicious without sufficient evidence. Optional public DNS and URL follows are limited to public hosts with strict SSRF protections. Missing authentication or DNS evidence is reported as missing, not invented. Outputs are compliance prechecks, drafts, or data lookups for human review. They are not official determinations, legal advice, identity confirmation, or certified filings. Related operations in this group include Analyze email headers, Detect email spoofing indicators, Detect phishing signals, Detect BEC patterns. Open the group documentation for the full request schema, field notes, and response examples before integrating.