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Twelve Data is a financial market data API platform for developers, offering data for stocks, forex, cryptocurrencies, ETFs, mutual funds, commodities, fixed income, and more. It is positioned not as a single market data feed, but as an integrated data service that combines market data, fundamentals, technical indicators, batch requests, real-time WebSocket streams, and spreadsheet plugins.
In terms of functionality, the platform covers real-time and historical time series, latest prices, quotes, pre-market and after-hours data, market status, exchange information, company financial statements, dividends and splits, earnings calendars, ETF/fund metrics, analyst ratings, and more. For developers, it supports REST API and WebSocket, returns JSON by default, and also supports CSV use cases. Authentication can be done via query parameters or an Authorization header. Official SDKs include Python, Node.js, Go, Java, R, and CLI, and OpenAPI/Swagger is also provided, making it suitable for auto-generating clients or integrating into AI/LLM workflows. Its ecosystem also includes Excel and Google Sheets plugins, MCP Server, OpenClaw, NEAR Agent, and TradingView charting technology for market page displays. Documentation quality is solid, with comprehensive Quickstart guides, error codes, rate limits, caching, secure storage guidance, code examples, and endpoint directories.
For individuals, there is a Basic free plan with 800 API credits per day, which is suitable for trial use. Grow, Pro, and Ultra are aimed at hobby projects, advanced integrations, and high-capacity individual usage respectively, with monthly pricing from $79, $229, to $999, and discounts for annual billing. Higher-tier plans include more markets, WS credits, SLA, dedicated CSM, and other benefits. Note that personal plans are limited to personal, internal, and non-commercial use; business and professional use requires Business. The platform does not sell individual datasets separately, and subscriptions are generally non-refundable.
The strengths are broad asset coverage, complete SDK support, developer-friendly documentation, and support for API/WebSocket/spreadsheet plugins at the same time. It is suitable for quantitative research, FinTech apps, market data displays, and algorithmic trading prototypes. The downsides are that the credits model takes some time to understand, advanced markets and high-frequency real-time streams can be costly, and there is no clear information on self-hosting capabilities. It is a good fit for developers and teams that want to quickly integrate global financial data. If you only need low-frequency free data, you may also compare Alpha Vantage, Finnhub, Polygon.io, Tiingo, Nasdaq Data Link, and similar services.
The source material does not provide information about access from mainland China, ICP filing, or local nodes, so this remains unknown. For payments, Twelve Data supports PayPal, major credit cards, and UnionPay, which is relatively friendly for users in China. However, network connectivity and business compliance still need to be tested in practice.
⚠ This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on twelvedata.com official site.
twelvedata.com is an United States API & Data provider. TG4G tracks its product information, an overall rating of 9.0/10, and a China-accessibility score of China direct-connect friendly. Click "Visit Official Site" to reach twelvedata.com directly.