Privacy-first MCP server for Polar AccessLink — health, sleep and training data.
Most developer tooling work still happens through a UI a human drives. Polarmcp MCP server moves it into the conversation instead. Privacy-first MCP server for Polar AccessLink — health, sleep and training data.
Installation goes through your MCP client rather than a global install: point it at delx-wellness-hermes on npm and it is fetched when the client starts. The copy-paste blocks for Claude Desktop, Claude Code and Cursor are further down this page.
The server publishes 5 tools. What each one is for:
polar_connection_status — verify local setup, scopes and readiness before calling Polarpolar_data_inventory — inventory supported data domains, scopes, privacy modes and recommended first calls without calling Polar APIspolar_daily_summary — sleep, activity, Nightly Recharge and training brief for todaypolar_weekly_summary — scorecard, comparison vs prior week, next-week planpolar_get_route — GPS coordinates redacted unless raw modeConfiguration is passed through the environment: POLAR_CLIENT_ID, POLAR_CLIENT_SECRET, POLAR_TOKEN_PATH, POLAR_CACHE_PATH. Treat anything key-shaped as a real credential — scope it to the minimum the server needs, and rotate it if it ever lands in a shared config.
http://127.0.0.1:3000/callbackAmong the developer tooling options, the useful question is rarely "what can it do" but "what does it cost you to run" — permissions, credentials, and how much of your context its toolset consumes. Polarmcp's toolset — polar_connection_status, polar_data_inventory, polar_daily_summary and 2 more — is a fair guide to whether it matches your workflow. It is maintained by davidmosiah; worth a glance at recent repository activity before you build anything load-bearing on it.
This entry was verified against Polarmcp's own documentation before publication; SyncDev keeps the directory reviewed rather than auto-generated.
| Tool | What it does |
|---|---|
| polar_connection_status | verify local setup, scopes and readiness before calling Polar |
| polar_data_inventory | inventory supported data domains, scopes, privacy modes and recommended first calls without calling Polar APIs. |
| polar_daily_summary | sleep, activity, Nightly Recharge and training brief for today |
| polar_weekly_summary | scorecard, comparison vs prior week, next-week plan |
| polar_get_route | GPS coordinates redacted unless raw mode |
{
"mcpServers": {
"polarmcp": {
"command": "npx",
"args": ["-y", "delx-wellness-hermes"],
"env": {
"POLAR_CLIENT_ID": "your-value",
"POLAR_CLIENT_SECRET": "your-value",
"POLAR_TOKEN_PATH": "your-value",
"POLAR_CACHE_PATH": "your-value"
}
}
}
}Add to claude_desktop_config.json, then restart Claude Desktop.
http://127.0.0.1:3000/callback| Variable | Description | Required |
|---|---|---|
| POLAR_CLIENT_ID | Configuration value read at startup. | Optional |
| POLAR_CLIENT_SECRET | Credential the server authenticates with. | Yes |
| POLAR_TOKEN_PATH | Credential the server authenticates with. | Yes |
| POLAR_CACHE_PATH | Filesystem location the server is allowed to use. | Optional |
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