Agentifact assessment — independently scored, not sponsored. Last verified Mar 6, 2026.
Twelve Data
Real-time and historical stock, forex, and crypto API with WebSocket support and 120+ technical indicators
Viable option — review the tradeoffs
You need real-time and historical market data (stocks, forex, crypto) with low-friction API integration for a financial dashboard or trading application.
Credit-based rate limiting (1 credit per symbol request). Pro plan gives ~610 symbols/minute; higher tiers unlock all 84 markets and remove daily limits. WebSocket streaming costs credits per symbol (e.g., 300 symbols = 300 WS credits/period). SLA is 99.95% on Pro+. Refunds are non-standard (mostly non-refundable), so test thoroughly on free tier first.
You're building a multi-asset portfolio tracker or backtesting engine that needs historical EOD data, fundamentals, and mutual fund metrics across global markets.
Historical data is included, but real-time streaming (WebSocket) consumes separate WS credits. Mutual funds and fixed income only unlock at Grow tier and above. No daily limits on Pro+, but credit budgets still apply. Switching plans is instant; unused balance carries over.
Credit system requires upfront capacity planning
API and WebSocket credits are separate pools with no overflow or sharing. A standard API request costs 1 credit per symbol; streaming 300 symbols costs 300 WS credits per billing period. If you miscalculate volume, you'll hit limits mid-month with no easy top-up mechanism (only plan upgrade). The free tier caps at 800 daily calls, forcing quick migration to paid.
Non-refundable subscription policy with no trial period
Twelve Data explicitly states most subscription payments are non-refundable. While the free tier lets you test the API, upgrading to a paid plan is a commitment. If you discover the credit allocation doesn't match your actual usage after a few days, you're locked in for the month. Mitigate by running detailed load tests on the free tier and contacting sales to validate your credit needs before upgrading.
Twelve Data offers more markets and real-time WebSocket support; Alpha Vantage is simpler and cheaper for US-only equity use cases.
You need multi-asset coverage (forex, crypto, commodities, bonds), real-time streaming, or 70+ global markets. Credit-based pricing is transparent and scales well for high-volume apps.
You're building a US-only stock screener or educational project. Alpha Vantage has a simpler free tier and lower entry cost, though fewer markets and no WebSocket.
Trust Breakdown
What It Actually Does
Twelve Data gives you real-time and historical data on stocks, forex, crypto, commodities, and more through a simple API. It includes live streaming, technical indicators, and company fundamentals like earnings and dividends.[1][2][8]
Real-time and historical stock, forex, and crypto API with WebSocket support and 120+ technical indicators.
Fit Assessment
Best for
- ✓data-analysis
- ✓knowledge-retrieval
Not ideal for
- ✗daily limit of 800 API calls on free plan
Known Failure Modes
- daily limit of 800 API calls on free plan
Score Breakdown
Protocol Support
Capabilities
Governance
- rate-limiting