Send a vehicle's GVWR, fuel, and engine year; get back its California Clean Truck Check obligation — subject or not, test type, cadence, annual fee, and enforcement. Built for dealers, TMS, and fleet platforms. The same key also powers DataQ violation scoring and HOS log auditing.
POST https://x3cleantruck.com/api/v1/ctc-score
x-api-key: x3q_live_••••••••
Content-Type: application/json
{ "vehicles": [ { "gvwr": 33000, "fuel": "diesel",
"engineYear": 2011, "registeredState": "TX" } ] }
{ "ok": true,
"program": "California Clean Truck Check (HD I/M)",
"source": "https://ww2.arb.ca.gov/our-work/programs/CTC",
"vehicles": [ { "subject": true,
"test_type": "Smoke opacity + visual (≤2012 diesel)",
"annual_fee": 32.13, "cadence": "Semi-annual...",
"enforcement": "DMV registration block" } ] }
One X3 Compliance API key — Clean Truck Check plus DataQ scoring and HOS auditing. Billed monthly by volume.
Tell us what you're building and your expected volume — or just grab a plan above.