Historical data format is the same as provided by real-time Poloniex WebSocket v2 API with addition of local timestamps and also with addition of symbol at the end of each message which allows us providing filtering for the data server-side. If you'd like to work with normalized data format instead (same format for each exchange) see downloadable CSV files or official client libs that perform data normalization client-side.
Tardis-machine is a locally runnable server that exposes API allowing efficiently requesting historical market data for whole time periods in contrast to HTTP API that provides data only in minute by minute slices.
See Poloniex WebSocket API docs providing documentation for each captured channel's format
Click any channel below to see HTTP API response with historical data recorded for it.
price_aggregated_book - initial book snapshot, book modifications, and trades
During data collection integrity of order book incremental updates is being validated using sequence numbers provided by real-time feed - in case of detecting missed message WebSocket connection is being restarted.
Each collected Poloniex real-time data message has appended symbol at the end of array - this allows us providing data filtering via API.