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The Data API is fully supported on Polymarket. Every figure is derived from on-chain Polygon settlement records and replayed through a share-level FIFO cost-basis engine, no off-chain estimates. It works on any public Polymarket address, not just wallets managed through Bravado, and the read endpoints require no funded account. Requests are signed with your partner API key (analytics.read scope) and require the polymarket venue on your partner account — enabled by default. See Data API authentication.

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What you can query

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Combos data

Polymarket is the only venue with Combos, and the Data API indexes every combo settlement on it, not only the ones placed through Bravado. The Combos Data API serves the combos, their legs (joined to Gamma market metadata), the trade tape, aggregate stats and a combo leaderboard, with a live settlement stream for Market Data keys. Volume and trade counts count one row per settlement (the taker fill), so a combo matched against several makers is not counted several times.

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Accounting model

PnL is computed under the Prediction Market Wallet Accounting Standard (PMWAS), so cost basis is consistent across every response rather than recomputed per endpoint.
All numeric fields are returned as JSON strings to preserve decimal precision. Parse them with an arbitrary-precision type, never a float. See Numeric conventions.