{"name":"The Used Car Index","version":"1.0.0","description":"NHTSA vehicle records and factual listing-change observations.","endpoint":"https://api.theusedcarindex.com/mcp","transport":"streamable-http","auth":"bearer","tools":[{"name":"vehicle_risk","description":"Returns recorded NHTSA complaint flags, component counts, recalls, investigations, manufacturer communications, source coverage, an optional verified sales-denominator rate, and separately labeled Jev model tags for one make, model and year. Tags cover model years 2012 and newer, about 43 percent of complaints overall. model_tags includes model/schema provenance, tagged_complaints, complaints_total, tagged_share and per-label counts, shares, mean_confidence and high/low confidence counts. Confidence is the model probability for its chosen label (0 to 1), not accuracy. NHTSA flags stay in complaints. Absent tags are null with model_tags_null_reason. Family spellings are resolved from the database. These are observed records, not a prediction, safety rating, verdict, repair advice or an individual vehicle history."},{"name":"compare_vehicles","description":"Returns compact recorded facts for two to five vehicles and factual orderings by complaints, recalls and available verified complaints-per-100k-sold rates. Unknown vehicles include database suggestions; unrated vehicles remain explicitly unrated. Counts reflect source coverage and a sales proxy where available; the comparison makes no recommendation, verdict or safety ranking."},{"name":"listing_changes","description":"Returns paginated observations of listing changes with VIN, price, mileage, dates, source and link, filtered by vehicle, event type or date. Collector status distinguishes an inactive feed from observed events. There are no photos or dealer-written text; a delisted event means only that the listing was no longer observed and does not establish a completed transaction."}]}