Polar MCP

An unofficial, local-first MCP server that connects AI agents to Polar AccessLink v4 data, exposing training, sleep, Nightly Recharge, PPI/HRV, and continuous sample signals. It handles OAuth locally, normalizes API responses, and redacts GPS coordinates by default to ensure privacy.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Community listingLocal stdioSource reviewed; not executedPublished by David Mosiah

Vendor documentation

What you can do with it

Analyze training load and recovery metrics
Review PPI and HRV physiology data
Plan nightly recharge strategies
Investigate route-aware session analysis

Source and maintenance

Community listingRegistry 0.3.6

mcp-registry: io.github.davidmosiah/polarmcp@0.3.6 Source repository Project website

Maintenance checked: Oct 31, 2026, 10:27 PM UTC

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

polar-mcp-unofficial 0.3.6

npm

polar-mcp-unofficial package definition

{
  "version": "0.3.6",
  "transport": "stdio",
  "identifier": "polar-mcp-unofficial",
  "registryType": "npm",
  "environmentVariables": [
    {
      "name": "POLAR_CLIENT_ID",
      "format": "string",
      "description": "Polar OAuth client ID. Optional when configured with polar-mcp-server setup."
    },
    {
      "name": "POLAR_CLIENT_SECRET",
      "format": "string",
      "description": "Polar OAuth client secret. Prefer polar-mcp-server setup so this secret is stored in ~/.polar-mcp/config.json instead of MCP client config."
    },
    {
      "name": "POLAR_REDIRECT_URI",
      "format": "string",
      "description": "Redirect URI configured in the Polar AccessLink admin. Optional when configured with polar-mcp-server setup."
    },
    {
      "name": "POLAR_TOKEN_PATH",
      "format": "string",
      "description": "Optional local path for OAuth tokens. Defaults to ~/.polar-mcp/tokens.json."
    },
    {
      "name": "POLAR_PRIVACY_MODE",
      "format": "string",
      "description": "Optional payload mode: summary, structured, or raw. Defaults to structured. raw means full Polar AccessLink payloads for supported endpoints."
    },
    {
      "name": "POLAR_CACHE",
      "format": "string",
      "description": "Optional SQLite cache toggle. Set to true or sqlite to enable."
    },
    {
      "name": "POLAR_CACHE_PATH",
      "format": "string",
      "description": "Optional local SQLite cache path. Defaults to ~/.polar-mcp/cache.sqlite."
    },
    {
      "name": "POLAR_NO_CACHE",
      "format": "string",
      "description": "Set to true to bypass the in-memory HTTP response cache (60s TTL for GET only). POST/PUT/DELETE and 4xx/5xx responses are never cached regardless."
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.

Cursor configuration

{
  "mcpServers": {
    "polar-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "polar-mcp-unofficial@0.3.6"
      ],
      "env": {
        "POLAR_CLIENT_ID": "<YOUR_POLAR_CLIENT_ID>",
        "POLAR_CLIENT_SECRET": "<YOUR_POLAR_CLIENT_SECRET>",
        "POLAR_REDIRECT_URI": "<YOUR_POLAR_REDIRECT_URI>",
        "POLAR_TOKEN_PATH": "<YOUR_POLAR_TOKEN_PATH>",
        "POLAR_PRIVACY_MODE": "<YOUR_POLAR_PRIVACY_MODE>",
        "POLAR_CACHE": "<YOUR_POLAR_CACHE>",
        "POLAR_CACHE_PATH": "<YOUR_POLAR_CACHE_PATH>",
        "POLAR_NO_CACHE": "<YOUR_POLAR_NO_CACHE>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.

Cline configuration

{
  "mcpServers": {
    "polar-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "polar-mcp-unofficial@0.3.6"
      ],
      "env": {
        "POLAR_CLIENT_ID": "<YOUR_POLAR_CLIENT_ID>",
        "POLAR_CLIENT_SECRET": "<YOUR_POLAR_CLIENT_SECRET>",
        "POLAR_REDIRECT_URI": "<YOUR_POLAR_REDIRECT_URI>",
        "POLAR_TOKEN_PATH": "<YOUR_POLAR_TOKEN_PATH>",
        "POLAR_PRIVACY_MODE": "<YOUR_POLAR_PRIVACY_MODE>",
        "POLAR_CACHE": "<YOUR_POLAR_CACHE>",
        "POLAR_CACHE_PATH": "<YOUR_POLAR_CACHE_PATH>",
        "POLAR_NO_CACHE": "<YOUR_POLAR_NO_CACHE>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.

VS Code configuration

{
  "servers": {
    "polar-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "polar-mcp-unofficial@0.3.6"
      ],
      "env": {
        "POLAR_CLIENT_ID": "<YOUR_POLAR_CLIENT_ID>",
        "POLAR_CLIENT_SECRET": "<YOUR_POLAR_CLIENT_SECRET>",
        "POLAR_REDIRECT_URI": "<YOUR_POLAR_REDIRECT_URI>",
        "POLAR_TOKEN_PATH": "<YOUR_POLAR_TOKEN_PATH>",
        "POLAR_PRIVACY_MODE": "<YOUR_POLAR_PRIVACY_MODE>",
        "POLAR_CACHE": "<YOUR_POLAR_CACHE>",
        "POLAR_CACHE_PATH": "<YOUR_POLAR_CACHE_PATH>",
        "POLAR_NO_CACHE": "<YOUR_POLAR_NO_CACHE>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.

Claude Desktop configuration

{
  "mcpServers": {
    "polar-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "polar-mcp-unofficial@0.3.6"
      ],
      "env": {
        "POLAR_CLIENT_ID": "<YOUR_POLAR_CLIENT_ID>",
        "POLAR_CLIENT_SECRET": "<YOUR_POLAR_CLIENT_SECRET>",
        "POLAR_REDIRECT_URI": "<YOUR_POLAR_REDIRECT_URI>",
        "POLAR_TOKEN_PATH": "<YOUR_POLAR_TOKEN_PATH>",
        "POLAR_PRIVACY_MODE": "<YOUR_POLAR_PRIVACY_MODE>",
        "POLAR_CACHE": "<YOUR_POLAR_CACHE>",
        "POLAR_CACHE_PATH": "<YOUR_POLAR_CACHE_PATH>",
        "POLAR_NO_CACHE": "<YOUR_POLAR_NO_CACHE>"
      }
    }
  }
}

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