Data API on Polymarket - Bravado

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.

What you can query

Data	Endpoint
Performance summary	`GET /traders/{address}`
Cumulative PnL series	`GET /traders/{address}/pnl`
Open positions	`GET /traders/{address}/positions/active`
Closed positions	`GET /traders/{address}/positions/closed`
Trade log	`GET /traders/{address}/trades`
Category breakdown	`GET /traders/{address}/categories`
PnL leaderboard	`GET /leaderboard`
Volume leaderboard	`GET /leaderboard/volume`
Tax summary	`GET /traders/{address}/tax-report`

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.

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