Real-time and historical
crypto market data through one API.

The live catalog includes supported USD-quoted crypto pairs aggregated across centralized venues, including major assets, network tokens, protocol tokens, and selected emerging assets. The live crypto symbol catalog is the source of truth, and additional tokens can be requested as coverage expands.

SiftingIO combines inputs from independent centralized venues using a volume- and reputation-weighted robust median. Stale, frozen, and hard-outlier observations are filtered before they can affect the published reference price.

No. It is an aggregated and derived reference value, not a raw order book, official venue price, or promise of executable liquidity at the published bid and ask. It is designed for valuation, research, monitoring, and product display rather than venue-specific execution.

The live API includes latest trade, top-of-book quote, previous daily close, full-market or watchlist snapshots, and WebSocket subscriptions for supported crypto symbols.

Yes. The market snapshot endpoint can return the full currently published crypto market or a requested watchlist of up to 250 symbols in one gzip-compressed response.

Yes. The documented Crypto Bars endpoint provides OHLCV at 1m, 5m, 15m, 30m, and 1h intervals for a supported subset of USD-quoted pairs. Earliest dates vary by asset, with selected series beginning as early as 2013. Available depth also depends on plan: one month on Free, one year on Builder, and full available history on Pro and above.

The v field represents base-asset volume as a float. For BTCUSD it is Bitcoin volume, and for ETHUSD it is Ether volume. Fractional amounts are preserved.

WebSocket publishes updated fair-price observations for actively updating symbols. Median SiftingIO API delivery is under 100 ms from primary regions, while source frequency, plan delivery cadence, and subscription limits may vary.

The API and crypto WebSocket service are designed for continuous access, reflecting the around-the-clock nature of centralized crypto markets. Individual symbols or source inputs may still experience temporary stale or unavailable periods, so clients should use timestamps and documented error states.

Send the API key in the X-API-Key header for REST requests. For WebSocket, pass the key in the ?key= query parameter or send an auth message immediately after connecting. Entitlements and connection limits follow the selected plan.

Yes. The FX / Crypto Converter endpoint converts supported crypto and fiat amounts using the current market rate and returns the applied rate, converted result, and timestamp.

Centralized-exchange crypto, DEX and DeFi data, and on-chain fundamentals are separate SiftingIO products and entitlements. They can be used under the same account and API-key system when the relevant markets are enabled.

Yes. FIX 4.4 market-data connectivity for eligible Crypto CEX and DEX workflows is available as an Enterprise offering. It is provisioned per account and does not include order entry.

Eligible Pro and Ultra plans include commercial use and customer-facing display subject to plan terms. Raw-feed redistribution, B2B sublicensing, custom distribution rights, and high-volume embedded use may require an Enterprise agreement.

Yes. The Free plan requires no credit card and includes 10,000 monthly REST calls, one WebSocket connection, five symbol subscriptions, one API key, and one month of historical depth for evaluation and internal non-commercial use.