RegRails

Deterministic compliance primitives for EU trade and AI rules. Structural checks and transparent arithmetic against published legal text — signed, evidenced, and honest about what they don't establish.

What this is not. Not legal advice. Not a customs ruling. Not a filing. RegRails does not supply default emission factors, does not consult satellite deforestation data, and does not classify your goods. Every response says so in-band.

CBAM · in force since 1 Jan 2026

EndpointDoesPrice
GET /v1/cbam/scopeIs this CN code in scope, which sector, does the 50 t de minimis apply$0.02
POST /v1/cbam/thresholdA year of import lines against the de minimis — catches the retroactivity trap on crossing$0.05
POST /v1/cbam/estimateEmbedded emissions and indicative cost, every arithmetic step echoed, your factors$0.25
POST /v1/cbam/declaration-checkStructural pre-submission check of a draft annual declaration$1.00

EUDR · 30 Dec 2026 large & medium

EndpointDoesPrice
GET /v1/eudr/scopeIn scope, which commodity, which deadline tier$0.02
POST /v1/eudr/dds-validateStructural validation of a draft Due Diligence Statement$0.15
POST /v1/eudr/geo-checkPlot geometry, area, and the 4 ha polygon rule — catches the lat/lon swap$0.10

AI Act Article 50 · applies since 2 Aug 2026

Transparency obligations were not deferred by the AI Omnibus, which moved only the high-risk dates to Dec 2027 and Aug 2028.

EndpointDoesPrice
GET /v1/aiact/art50Which controls apply to your obligation category$0.04
POST /v1/aiact/art50-checkCoverage check on declared controls$0.04
POST /v1/aiact/c2pa-checkContent-credential manifest structure$0.04

Free

/v1/calendar — the compliance dates, including the ones that moved.
/v1/methodology — what every check does and does not establish.

Two ways to pay

API key — monthly quota, normal invoice. For customs brokers, ERP vendors and compliance teams.
x402 — USDC on Base, per call, no account, no key. For agents.