Polygon

About Polygon

Polygon (operated by Massive) provides market data APIs covering stocks, options, indices, currencies, and futures. Data is sourced directly from exchanges via co-located datacenter infrastructure with direct fiber cross-connects, covering all US exchanges, dark pools, and OTC markets for stocks, with 32,345+ tickers since 2003, 1.67M+ options contracts since 2014, 11,409+ indices since 2023, 1,750+ currency pairs since 2009, and 361K+ futures contracts since 2017.

Access methods include a RESTful API, WebSocket API for real-time data, flat files via an S3 interface, and a SQL query option. Data is available in JSON and CSV formats, with client libraries provided for Python, JavaScript, Go, and Java. Historical data coverage extends up to 20+ years depending on plan, with data recency ranging from end-of-day to real-time.

The product is aimed at developers building trading applications, robo-advisors, research agents, and dashboards, including individual developers and businesses. It also supports integration with AI tools such as Claude, ChatGPT, Cursor, Codex, Copilot, Gemini CLI, and Claude Desktop through a documented setup instruction and a remote MCP server.

Key features

• Real-time and historical market data for stocks, options, indices, currencies, and futures
• Data delivered via REST API, WebSocket, flat files (S3), and SQL query access
• Client libraries and JSON/CSV formats for easy integration
• Direct fiber cross-connects to major exchanges for low-latency data
• Remote MCP server and AI agent setup for tools like Claude and ChatGPT
• Full options chain data including Greeks, implied volatility, and trade-level detail

Frequently asked questions