Polygon.io MCP Server

Polygon.io · Market & Financial Data

Official

Tick-level US equities data, WebSocket streaming and low-latency quotes.

tick datastreamingUS equities

Status

Official

Auth

API key

Hosting

Both

Community rating

Not rated yet

Open documentation →

Rate this server

How to connect Polygon.io MCP Server

Step 1

Local server — run it on your machine

Polygon.io MCP Server runs locally over stdio. You need Node.js (for npx) or Python (for uvx) installed, then add the command below to your client's MCP config file.

Command

uvx --from git+https://github.com/polygon-io/mcp_polygon@v0.4.0 mcp_polygon

Client config snippet

{
  "mcpServers": {
    "polygon-io": {
      "command": "uvx",
      "args": [
        "--from",
        "git+https://github.com/polygon-io/mcp_polygon@v0.4.0",
        "mcp_polygon"
      ]
    }
  }
}

Step 2

Authenticate with API key

Create a key in the vendor's dashboard and store it as an environment variable in your client config — never paste it into a chat window.

Step 3

Verify, then widen access

Restart your client, confirm the server's tools appear, and run one read-only question first. Keep client-side approval prompts on for any tool that can write, trade or send. Confirm with your firm's compliance policy before connecting systems holding client data.

Read the full connection guide →