Twelve Data API
Real-time and historical data with 99.95% uptime guarantee
Freemium
✓ Verified
🌐 Rest of the world
Twelve Data is built for developers who need reliability. With a 99.95% uptime SLA and a usable free tier (800 requests/day), it’s a developer favorite for production applications. It covers real-time and historical quotes, technical indicators, earnings data, and forex for 50+ global markets. WebSocket streaming is available for real-time feeds. Python, JavaScript, and PHP client libraries speed up development. Paid plans are competitively priced starting at $29/month. The combination of reliability, good documentation, and SDKs makes it one of the most recommend APIs for production stock market apps.
API Details
Auth Method
API Key
Pricing Model
Freemium
Free Tier
Yes — 800 requests/day, 8 per minute free
Rate Limit
55–2400 RPM (paid)
Format
REST / WebSocket / JSON
Versioning
v1
SLA / Uptime
99.95%
Compliance
Standard data licensing
Geographic Restrictions
US and 50+ global markets
Last Verified
2026-02-20
Categories
Frequently Asked Questions
Twelve Data offers a free tier with 800 API credits per day (most endpoints use 1 credit per request) and 8 API calls per minute. This is sufficient for development and light production use. Paid plans start at $29/month for 5,000 credits/day. Enterprise plans include unlimited requests and WebSocket streaming.
Twelve Data covers stocks (US and international), ETFs, mutual funds, indices, forex pairs, and cryptocurrencies u2014 all in a single unified API. Over 100,000 instruments are available. This breadth makes it a strong choice when you need multiple asset classes without managing multiple API subscriptions.
Yes u2014 Twelve Data includes 100+ built-in technical indicators (MA, EMA, RSI, MACD, Bollinger Bands, ATR, etc.) calculated server-side. You request the indicator directly via API rather than calculating it yourself. This simplifies charting and signal generation without requiring a separate technical analysis library.
Yes. Twelve Data provides WebSocket streaming for real-time price quotes on stocks, forex, and crypto. Available on Growth plans and above. The WebSocket feed delivers sub-second price updates for actively traded instruments. For lower-cost real-time needs, their REST API with short polling intervals works well on paid plans.