Match-level value finder (Elo win prob vs implied odds)

Flags upcoming games where the Elo-implied win probability beats the de-vigged market price by at least min_edge percentage points. WC2026 plays on neutral sites, so the Elo home-court bump is suppressed and the note is echoed in neutral_site_note. Filter by sport/league using brand aliases (nba, nhl, ...) or canonical slugs (basketball, soccer, ...); passing both with a conflict returns 400; omit both for all sports. Requires a 2-way American moneyline plus an Elo rating for both teams; a candidate whose only odds are decimal-format or a 3-way market (with a draw) is reported in odds_unresolved rather than force-fit, and an empty or partial result explains itself in coverage_note (null when value games were found). Response object keys: model, window, min_edge_pct, sport, evaluated, value_found, odds_unresolved, neutral_site_note, coverage_note, games[], generated_at. 5-minute Redis cache. Edge plan or higher: model-ready value signals start at Edge; Free / Solo / Trio receive a 403 naming the tier and linking the docs and pricing pages. A sport or league we cannot resolve returns 400 naming the value and suggesting the valid keys, rather than widening to every sport. Until 2026-10-07 it widened: measured in production that day, ?league=ZZZ_NOT_A_LEAGUE and no parameter at all both returned evaluated 217, against 3 for ?league=nba and 17 for ?league=nhl.