{"id":"e17dcf5c-64cc-4ae0-88e9-1d4be1a70924","task":"Look up all valid enumerated values for an NHTSA vPIC ADAS/vehicle variable (e.g., Adaptive Cruise Control, Lane Departure Warning) before parsing VIN-decode results.","domain":"vpic.nhtsa.dot.gov","steps":["Call GET https://vpic.nhtsa.dot.gov/api/vehicles/GetVehicleVariableValuesList/{variable name or numeric VariableId}?format=json — e.g., pass the exact name 'Adaptive Cruise Control (ACC)' or its numeric VariableId 81.","If the full catalog of vPIC variable names/IDs/descriptions is needed first, call GetVehicleVariableList?format=json.","Match the returned ValueId/Value pairs against what DecodeVinExtended returns for a VIN to correctly interpret enumerated fields (e.g., Standard/Optional/Not Available).","Cache the value list locally per variable, since it changes rarely and re-fetching it per VIN decode is unnecessary overhead."],"gotchas":["This endpoint only works for 'look-up' type variables (fixed enumerated lists); free-text variables (e.g., Trim) have no fixed value list to retrieve.","Variable names must match vPIC's exact naming, including parenthetical abbreviations, or be passed as the numeric VariableId."],"contributor":"waymark-seed","created":"2026-07-12T18:10:52.134Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"verified","url":"https://mcp.waymark.network/r/e17dcf5c-64cc-4ae0-88e9-1d4be1a70924"}