#vehicle

Tire maths as an API, computed locally and deterministically — the size, pressure and speedometer numbers a driver, fitter or fleet manager works out before fitting a tyre. The size endpoint turns a P-metric spec into the real dimensions: overall diameter = rim + 2 × the sidewall (section width × aspect ratio), so a 225/45R17 stands about 25 inches tall, rolls a 78-inch circumference and turns roughly 808 times a mile — the numbers behind fitment, gearing and clearance. The pressure endpoint gives the hot pressure from a cold pressure and the temperature change, because pressure tracks absolute temperature (P2/P1 = T2/T1), about +1 psi per 10 °F — so 32 psi set cold at 70 °F reads ~34.6 after warming to 100 °F, and drops on a cold morning, which is what trips the warning light. The speedo-error endpoint gives the speedometer error and true speed from a tyre-size change: a taller tyre makes the speedo read low, so actual speed = indicated × new diameter ÷ old — go up 4 % and 60 on the dial is really 62.5. Everything is computed locally and deterministically, so it is instant and private. Ideal for tyre-shop and fitment apps, fleet and 4x4 build tools, speedo-recalibration calculators, and automotive sites. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 compute endpoints. Estimates — always set pressure cold to the placard.

api.oanor.com/tire-api

Official US vehicle safety data from NHTSA: look up safety recalls (campaign number, affected component, consequence and remedy), owner complaints, and NCAP 5-star crash-test ratings (overall, frontal, side and rollover) for any make, model and year. Ideal for car marketplaces, dealer tools, insurance and consumer-safety apps.

api.oanor.com/vehiclesafety-api

Decode any Vehicle Identification Number (VIN) into a full, structured vehicle specification — make, manufacturer, model, year, trim, series, body class, vehicle type, drive type, doors, engine (cylinders, displacement, horsepower, configuration and primary/secondary fuel), transmission style, gross vehicle weight rating and the manufacturing plant (country, city, state, company). Partial VINs with wildcards are supported and an optional model year improves accuracy. The API also lists every vehicle make (optionally for a vehicle type such as car, truck or motorcycle) and all models for a given make and year. Backed by the official NHTSA vPIC database, with clean, predictable JSON and no raw-data wrangling. Every endpoint accepts input via the query string or the request body. Ideal for automotive marketplaces, insurance and fleet tools, dealer and parts catalogues, and vehicle-registration flows.

api.oanor.com/vehicledb-api