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MCP Polygon
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MCP Polygon

The Polygon.io MCP Server is an experimental project that provides an LLM-friendly access interface to Polygon.io's financial market data API through the Model Context Protocol (MCP). This server exposes all of Polygon.io's API endpoints as MCP tools, supporting queries for various financial data such as stocks, options, foreign exchange, and cryptocurrencies.
FinanceResearch and data#Financial Data#API Interface#LLM Tool.Python
2.5 points
18

What is the Polygon.io MCP Server?

This is a server based on the Model Context Protocol (MCP) that transforms Polygon.io's financial data API into a tool interface suitable for use with large language models (LLMs). It allows you to obtain comprehensive financial market data through natural language queries.

How to use the Polygon.io MCP Server?

You can integrate this service through Claude Code or Claude Desktop. After installation, you can query financial data using natural language.

Use Cases

Suitable for investors, analysts, fintech developers, and researchers who need real-time or historical financial market data.

Main Features

Market DataProvides aggregated data (OHLC) and real-time trading data for stocks, options, foreign exchange, and cryptocurrencies.
Historical DataAllows querying of historical trading, quote, and market snapshot data.
Fundamental DataContains corporate financial fundamental data, dividend, and stock split information.
Market StatusProvides market status, trading hours, and holiday information.

Advantages and Limitations

Advantages
Natural language interface, no need to write complex code
Covers a comprehensive range of financial market data types
Both real-time and historical data can be obtained
Seamless integration with Claude AI
Limitations
Requires a Polygon.io API key
Experimental project, may have significant changes
Some advanced features require technical knowledge for configuration

How to Use

Get an API Key
Register on the Polygon.io official website and obtain an API key.
Install Claude Code
Install the Claude Code command-line tool via npm.
Add the MCP Server
Use the claude command to add the Polygon MCP server.
Start Querying
After running the claude command, you can query financial data using natural language.

Usage Examples

Query Stock PriceGet the latest price information of a stock
Analyze Market TrendsQuery the historical performance of a stock
Monitor Market DynamicsGet the stocks with the best performance in the market today

Frequently Asked Questions

Is it free?
Which markets' data are supported?
What is the data latency?
How to update the API key?

Related Resources

Polygon.io Documentation
Official API documentation of Polygon.io
Model Context Protocol
Official website of the MCP protocol
MCP Python SDK
Python SDK code library for the MCP protocol
Installation
Copy the following command to your Client for configuration
{
    "mcpServers": {
        "polygon": {
            "command": "<path_to_your_uvx_install>/uvx",
            "args": [
                "--from",
                "git+https://github.com/polygon-io/mcp_polygon@master",
                "mcp_polygon"
            ],
            "env": {
                "POLYGON_API_KEY": "<your_api_key_here>",
                "HOME": "<your_home_directory>"
            }
        }
    }
}
Note: Your key is sensitive information, do not share it with anyone.
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