Polymarket prediction market data endpoints, plus API documentation and monitoring.

Resources & endpoints

Polymarket Platform

Platform Aggregates

Returns a platform-wide time series combining trading volume, open interest, and fee aggregates across all Polymarket markets.

GET

https://api.pinax.network/v1/polymarket/platform

Requires bearer token — sign in to inject your team’s key.

Optional parameters

Name	Type	Description
interval query	Enum · 8	The interval* for which to aggregate price data (1-minute, 5-minutes, 10-minutes, 30-minutes, hourly, 4-hours, daily or weekly). *Plan restricted. 1m5m10m30m1h4h1d1w
start_time query	Datetime	UNIX timestamp in seconds or date string (e.g. "2025-01-01T00:00:00Z", "2025-01-01", ...).
end_time query	Datetime	UNIX timestamp in seconds or date string (e.g. "2025-01-01T00:00:00Z", "2025-01-01", ...).
limit query	integer	Number of items* returned in a single request. *Plan restricted.
page query	integer	Page number to fetch. Empty `data` array signifies end of results.

Response

200 OK

{
  "data": [
    {
      "timestamp": "2026-04-15 00:00:00",
      "volume": 148067185.09,
      "buy_volume": 39470527.47,
      "sell_volume": 108596657.62,
      "trades": 3065040,
      "buys": 638547,
      "sells": 2426493,
      "net_open_interest": 161012348.11,
      "split_amount": 222905687.23,
      "merge_amount": 61893339.12,
      "split_count": 4045998,
      "merge_count": 338837,
      "oi_transactions": 4384835,
      "total_fees": 20602487.78,
      "total_refunds": 17060492.91,
      "net_fees": 3541994.86,
      "fee_count": 7360794,
      "effective_fee_rate_gross": 0.139,
      "effective_fee_rate": 0.024
    }
  ]
}