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Supercharge your AI agents with Polar as a Model Context Protocol (MCP) server.

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What is MCP?

MCP is a protocol for integrating tools with AI agents. It can greatly enhance the capabilities of your AI agents by providing them with real-time data and context. Polar offers a remote MCP server that you can connect to from most AI clients.

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How does it work?

You need a MCP-capable agent environment to use Polar over MCP. A few of them are Claude Desktop and Cursor.

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Connecting to Polar MCP

Polar provides two MCP servers:
  • Production: https://mcp.polar.sh/mcp/polar-mcp - Connect to your live Polar organization
  • Sandbox: https://mcp.polar.sh/mcp/polar-sandbox - Connect to the Polar sandbox environment for testing
When you can specify a MCP URL, use one of the URLs above depending on your environment. If you have to specify a command, use: 
{
  "mcpServers": {
    "Polar": {
      "command": "npx",
      "args": ["mcp-remote", "https://mcp.polar.sh/mcp/polar-mcp"]
    }
  }
}
For sandbox: 
{
  "mcpServers": {
    "Polar Sandbox": {
      "command": "npx",
      "args": ["mcp-remote", "https://mcp.polar.sh/mcp/polar-sandbox"]
    }
  }
}

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Cursor

In .cursor/mcp.json, add: 
{
  "mcpServers": {
    "Polar": {
      "url": "https://mcp.polar.sh/mcp/polar-mcp"
    }
  }
}
For sandbox: 
{
  "mcpServers": {
    "Polar Sandbox": {
      "url": "https://mcp.polar.sh/mcp/polar-sandbox"
    }
  }
}

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Windsurf

In mcp_config.json, add: 
{
  "mcpServers": {
    "Polar": {
      "command": "npx",
      "args": ["mcp-remote", "https://mcp.polar.sh/mcp/polar-mcp"]
    }
  }
}
For sandbox: 
{
  "mcpServers": {
    "Polar Sandbox": {
      "command": "npx",
      "args": ["mcp-remote", "https://mcp.polar.sh/mcp/polar-sandbox"]
    }
  }
}

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Codex

Add the following to your ~/.codex/config.toml: 
[features]
rmcp_client = true

[mcp_servers.polar]
type = "http"
url = "https://mcp.polar.sh/mcp/polar-mcp"
Then run: 
codex mcp login polar
For sandbox: 
[features]
rmcp_client = true

[mcp_servers.polar_sandbox]
type = "http"
url = "https://mcp.polar.sh/mcp/polar-sandbox"
Then run: 
codex mcp login polar_sandbox

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Claude Code

Run the following command: 
claude mcp add --transport http "Polar" "https://mcp.polar.sh/mcp/polar-mcp"
For sandbox: 
claude mcp add --transport http "Polar Sandbox" "https://mcp.polar.sh/mcp/polar-sandbox"

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ChatGPT

MCP is only available for paid users in beta on ChatGPT web, by enabling Developer Mode. Once Developer Mode is enabled, go to Settings → Connectors and add the MCP server using https://mcp.polar.sh/mcp/polar-mcp. For sandbox, use https://mcp.polar.sh/mcp/polar-sandbox instead.

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Claude Desktop

Go to Settings → Connectors and click Add custom connector. Name it “Polar” and add https://mcp.polar.sh/mcp/polar-mcp as the server URL. For sandbox, use https://mcp.polar.sh/mcp/polar-sandbox as the server URL instead. Save, and click Connect to connect to your Polar organization.