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SiftingIO
One schema for quotes across several asset classes
What it is
A market-data API for US stocks, forex, crypto, commodities, decentralized-exchange markets, and on-chain metrics, all normalized to one JSON schema. REST serves snapshots and history, WebSocket serves live quotes and trades, and the same key and field names apply across those markets, with SDKs for Python, Go, and JavaScript. Developers and research teams building dashboards, alerts, or backtests can try a free tier that hits the production endpoints. History depth differs by market and symbol, free usage is capped, and the feed is a merged vendor view rather than a raw line from each venue.
At a glance
Worth watchingOur rating, based on popularity, maintenance and how ready it is for real use.
| Best for | Developers |
|---|---|
| Used for | Data source |
| Markets | Multi-market |
| Stack | Python |
| Learning curve | Easy to start |
| Practical value | Medium practical value |
| Cost | Free, with paid APIs |
| Hardware | No GPU needed |
Market data over REST and WebSocket with a permanent free non-commercial tier per market: 10,000 monthly REST calls, 60 requests per minute, five streaming symbols and one month of history,
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