polygon-io/mcp_polygon

Description:

An experimental Model Context Protocol (MCP) server that provides access to Polygon.io's financial market data APIs for stocks, indices, forex, options, and more. It is designed to be LLM-friendly, exposing all Polygon.io API endpoints as tools for programmatic access.

Source: https://github.com/polygon-io/mcp_polygon

Category: Finance Market Data MCP Servers

Tags: polygon-io, market-data, finance, api-integration

Features

• Exposes all Polygon.io API endpoints as MCP tools accessible via LLMs or programmatically
• Access to comprehensive financial market data, including:
  • Stock, options, forex, and crypto aggregates (OHLC) and bars
  • Real-time and historical trades and quotes
  • Market snapshots for tickers
  • Ticker details and reference data
  • Dividends and splits data
  • Financial fundamentals for companies
  • Market status and trading holidays
  • News articles for tickers
• Implements endpoints as tools (examples):
  • get_aggs: Stock aggregates (OHLC) for a ticker
  • list_trades: Historical trade data
  • get_last_trade: Latest trade for a symbol
  • list_ticker_news: Recent news for tickers
  • get_snapshot_ticker: Current market snapshot for a ticker
  • get_market_status: Current market status and trading hours
  • list_stock_financials: Company fundamentals
• LLM-friendly: Converts responses to standard JSON for easy processing
• Can be integrated both with Claude Code (CLI) and Claude Desktop
• Dockerfile and docker-compose included for easy deployment
• Debugging support via MCP Inspector browser interface
• Open source (MIT License)

Installation & Requirements

• Python 3.8+
• Polygon.io API key
• Astral UV (Python environment manager)
• Supports installation for both CLI and desktop environments

Development

• Codebase primarily in Python
• Supports local development and debugging
• Contributions welcome via GitHub issues and PRs (preferably discussed beforehand)

Pricing

No pricing information is provided for the MCP server itself. A valid Polygon.io API key (which may be subject to Polygon.io's own pricing) is required to access data.

Note: This project is experimental and may be subject to breaking changes.