Data / Specs and VIN decode
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Dataset

Specs and VIN decode

Every vehicle is decoded from its VIN, so specs are verified rather than copied from the listing: body class, engine, drivetrain, fuel, cylinders, and doors. You can also decode any 17-char VIN live.

How to query this dataset
Per vehicle
the vin_decode and spec fields in https://www.castlecdjrnaperville.com/ai/v/{VIN}.json
Readable
https://www.castlecdjrnaperville.com/ai/v/{VIN}.md
MCP tool
decode_vin(vin) (any VIN, live decode)
curl
curl -s https://www.castlecdjrnaperville.com/ai/v/1C6SRFUP4TN407987.json
FieldSample: decoded from VIN
Vehicle2026 RAM 1500 RHO
VIN1C6SRFUP4TN407987
ClassTRUCK
BodyPickup
Engine3.0L I6
Drivetrain4WD
FuelGasoline
Transmission8-Speed Automatic
Full record: /v/1C6SRFUP4TN407987.json | /v/1C6SRFUP4TN407987.md