Product updates
New exchange coverage, channels, clients and API changes
Bullish market data
Historical Bullish market data is now available, including order book updates, trades, top-of-book updates, tickers, index prices, and perpetual and options data.
Bullish data normalization is available in Node.js client tardis-dev 16.4.0 and Tardis Machine 16.4.1.
Optimized filtered data feed requests
Filtered raw HTTP data feed requests can now use the optional sliceSize parameter to fetch up to 10 consecutive minutes per request. Use it to reduce the number of API requests when replaying historical data through the raw HTTP API. Omit sliceSize to keep the existing one-minute behavior.
Responses include x-slice-size with the slice size used and x-suggested-slice-size as a recommendation for future requests with the same filter applied. The recommendation balances fewer requests against response size.
The Node.js client tardis-dev 16.3.1, Python client tardis-dev 4.2.0, and Tardis Machine 16.2.1 use this automatically for filtered historical replay, so library users get fewer API requests without changing replay code.
Bitget V3 market data
Bitget Spot and Bitget Futures raw historical feeds now use Bitget WebSocket API V3. Order book collection now uses the books full-depth channel.
Bitget Futures also includes the V3 liquidation channel. Replaying or normalizing Bitget data recorded from 2026-04-28 onward requires Node.js client tardis-dev 16.2.1 or newer, or Tardis Machine 16.1.2 or newer, because older clients do not support the new V3 raw message formats.
Find instrument symbols
You can now find exchange-specific instrument symbols from normalized market filters across multiple exchanges. Use this when you know the market you want, such as active BTC/USDT linear perpetuals, but do not want to hardcode each exchange's symbol format.
The new Node.js findInstrumentSymbols() helper and Python find_instrument_symbols() helpers use Instruments Metadata API filters and return symbols grouped by exchange.
Available in Node.js client tardis-dev 16.2.0 and Python client tardis-dev 4.1.0.
Instruments metadata min notional and underlying type
Instruments metadata now includes minNotional when an exchange exposes a minimum order value or notional separately from minimum order quantity.
It also includes underlyingType for non-option instruments, using native for crypto-native instruments and exchange-sourced classifications such as equity, commodity, fx, index, fixed_income, or pre_market when available. The instruments filter endpoint accepts underlyingType, so you can query categories such as commodity perpetuals on supported exchanges.
Lighter market data
Historical Lighter market data is now available, including order book updates, trades, tickers, and perpetual and spot market stats.
Data normalization for Lighter is available in Node.js client tardis-dev 16.1.1 and Tardis Machine 16.1.0.
Binance index constituents
You can now replay historical Binance USDS-M Futures index price constituents through the generated indexConstituents channel.
Binance's REST endpoint exposes the current index constituents. We record those payloads into the minute-by-minute historical feed, so you can inspect how each index's constituent exchanges, symbols, prices and weights changed over time.
Binance premium index data
You can now replay Binance USDS-M Futures premium index snapshots through the generated premiumIndex channel.
This adds access to Binance's REST premium index payloads in the same minute-by-minute historical feed format as our other channels, including interestRate, which is not available in the WebSocket markPrice stream.
Unified Python client v3
The Python client is now a unified tardis-dev client for historical replay, CSV dataset downloads, cache management and exchange metadata.
It exposes a simpler top-level API for the most common workflows:
replay()for historical market data replaydownload_datasets()for CSV dataset downloadsclear_cache()for local cache cleanupget_exchange_details()for exchange metadata
replay() also accepts Python datetime values for from_date and to_date. Naive datetimes are treated as UTC.
ESM Node.js client
The Node.js client is now ESM-only, with simplified package exports and examples that use native ES module syntax.
Tardis Machine Docker images
Tardis Machine Docker images are now published for both x64 and ARM64 architectures, making local replay and streaming easier to run on Apple Silicon machines, ARM servers and standard x64 environments.
Binance Futures WebSocket endpoints
Our backend services, Tardis Machine, and the Node.js client now handle Binance Futures' split public WebSocket endpoints, keeping real-time streaming aligned with Binance's exchange-side API changes.
This shipped in tardis-dev 14.3.0 and tardis-machine 14.3.0.
Binance funding info
Generated fundingInfo channels are now available for Binance USDS-M Futures and Binance COIN Futures.
These channels expose Binance funding cap, floor and interval updates in the historical data feed when Binance publishes adjusted funding information.
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