A live, fully operational B2B tariff data API covering the US, Canada, and Mexico, with 66,000+ tariff records served as clean JSON and synced nightly from official government sources with automated validation. The platform includes a Federal Register monitoring pipeline, Chapter 99 IEEPA overlay system, webhook change notifications, Stripe billing across four tiers, self-serve trials, an admin dashboard, QA test suite and automated tariff news engine. Built by one engineer and running unattended (~$100/month as configured, downsizable to under $50), the business is pre-revenue and may be well-suited for a freight-tech, customs, or trade compliance buyer with existing distribution. Key Highlights ✅ Provides Federal Register monitoring, Chapter 99 overlays, and webhook change notifications ✅ Includes Stripe billing, self-serve trials, admin dashboard, 89-test QA suite, and automated news engine ✅ Pre-revenue; hosting downsizable to ~$25-50/month; disclosed SEO recovery still unproven