polygon-io/mcp_polygon)

Overview

MCP server that provides access to financial market data from Polygon.io. It allows AI assistants to retrieve real-time and historical stock, options, and forex data through the Model Context Protocol. Built in Python, it exposes endpoints for querying market data programmatically.

Best for

Best for
Developers building AI assistants that need financial market data

Use cases

• Fetching real-time stock prices for analysis
• Retrieving historical market data for backtesting
• Integrating financial data into AI-powered financial reports

How to use

Install

npx @modelcontextprotocol/inspector uv --directory /path/to/mcp_massive run mcp_massive

Tools exposed

• search_endpoints
• call_api
• query_data
• MASSIVE_API_KEY
• POLYGON_API_KEY
• MCP_TRANSPORT
• MASSIVE_API_BASE_URL
• MASSIVE_LLMS_TXT_URL
• MASSIVE_MAX_TABLES
• MASSIVE_MAX_ROWS

Tested with

Claude Desktop, Claude Code

Notes

MCP server that provides access to financial market data from Polygon.io. It allows AI assistants to retrieve real-time and historical stock, options, and forex data through the Model Context Protocol. Built in Python, it exposes endpoints for querying market data programmatically.

346 stars on GitHub. Last updated 2026-05-05. Licensed MIT.

Use cases

• Fetching real-time stock prices for analysis
• Retrieving historical market data for backtesting
• Integrating financial data into AI-powered financial reports

Pros

• Well-documented and easy to set up with MCP-compatible AI tools
• Provides access to comprehensive financial datasets from Polygon.io
• Actively maintained with 346 GitHub stars

Cons

• Requires a Polygon.io API subscription for data access
• Limited to the data types and endpoints supported by Polygon.io
• May have latency for real-time data depending on the API plan

Indexed from awesome-mcp-servers-punkpeye and enriched against its public facts.