The mapped match-winner market for one match, with its recent price ticks per side, newest first.

404 with error: no_market (since 2026-09-02; match_id and coverage: "none" alongside) when no match-winner market is mapped to the match — a market is mapped only where one is published for that fixture, so a client walking every live match will meet this. A bare not_found means the match id itself does not exist. Every row of GET /matches carries has_market, so a slate can be filtered before any call here. GET /matches/{matchId} answers 200 for the same match with market and market_price set to null instead, and carries the live score in the same response, so a per-match poll built on the detail route never spends a call on a 404.

Ticks are kept for 30 days and then deleted: a market older than that answers with an empty prices array while staying mapped — retention, not a fault. For paging past 500 ticks use /matches/{matchId}/prices with its cursor.