Twelve Data
Stock, forex, and crypto data over REST and websockets, with a generous free tier.
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Overview
Twelve Data provides market data for stocks, forex, ETFs, indices, and crypto through one API, with technical indicators computed server-side.
Access is over REST and WebSocket, with fundamentals and reference data alongside prices. SDKs are available in several languages. The free tier is rate-limited, which is the main constraint when backfilling long historical series.
Common use cases
- Fetch prices for stocks, forex, and crypto from one API
- Stream live quotes over WebSocket
- Get technical indicators without computing them locally
- Backfill historical series for analysis
Key Features
- Stocks, forex, ETFs, indices, and crypto in one API
- REST plus WebSocket streaming
- Technical indicators computed server-side
- Fundamentals and reference data
- Generous free tier with clear rate limits
- SDKs across several languages
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