API

One GET request, JSON back. No key required for the free tier.

Returns the same analysis the web page shows: score, bulkSender, spf, dkim, dmarc (including the full treeWalk path), mx, and a sorted findings array.

Limits

• 25 audits per day, per caller, free.
• One domain per request. Batch endpoints arrive with paid access.
• Over the limit returns 429 with {"error":"rate_limited"}.
• Invalid input returns 400 with {"error":"invalid_domain"}.

Stability

The /v1/ prefix is a commitment: fields may be added, but existing field names and meanings will not change under v1. Breaking changes get a new prefix.