Is io.github.StuMason/polar-flow-server safe to use?

io.github.StuMason/polar-flow-server has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments.

How do I install io.github.StuMason/polar-flow-server?

io.github.StuMason/polar-flow-server can be installed by cloning its GitHub repository and following the setup instructions in the README.

What can io.github.StuMason/polar-flow-server do?

io.github.StuMason/polar-flow-server provides 7 tools: Overview, Sleep, user_id, Setup, Dashboard and 2 more. See the full tools list on the server page for descriptions and parameters.

What AI clients work with io.github.StuMason/polar-flow-server?

io.github.StuMason/polar-flow-server is compatible with claude-desktop, cursor, claude-code. It uses http transport.

Is io.github.StuMason/polar-flow-server actively maintained?

io.github.StuMason/polar-flow-server is actively maintained — last commit was 17 days ago. It has 22 GitHub stars.

io.github.StuMason/polar-flow-server

Self-hosted Polar health analytics with a built-in MCP server: sleep, HRV, workouts, baselines.

22 7 tools GitHub

No known CVEs

No license

Actively maintained

Last commit 17d ago

Works with most clients

Transport: http

7 tools

Grade F

MCPpedia last refreshed this data 15h ago

Edit this pageView history

io.github.StuMason/polar-flow-server is an MCP server that self-hosted Polar health analytics with a built-in MCP server: sleep, HRV, workouts, baselines. Its tool list has not been published yet over http, requires no API key, and scores 35/100 on MCPpedia's security, maintenance and efficiency rubric.

Health

Step 1

Install in your client

Config is the same across clients — only the file and path differ.

Supported in Claude Desktophttp · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "io-github-stumason-polar-flow-server": {
      "command": "<see-readme>",
      "args": []
    }
  }
}

Are you the author?

Add this badge to your README to show your security score and help users find safe servers.

Embed in your READMEAbout badges →

[![MCPpedia Score](https://mcppedia.org/api/badge/io-github-stumason-polar-flow-server)](https://mcppedia.org/s/io-github-stumason-polar-flow-server)

Read me

What io.github.StuMason/polar-flow-server does

Self-hosted health analytics for Polar devices — own your data, analyze it against your own baselines, and let your AI assistant read it.

Test This Server

No automated test available for this server. Check the GitHub README for setup instructions.

Loading README…

Scored, not listed

Why this score

Five weighted categories — click any category to see the underlying evidence.

Score breakdown

35/100across 5 weighted dimensions

How we score →

0255075100

−65

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

No package registry to scan.

Inventory

Tools (7)

Click any tool to inspect its schema.

Community

Reviews

Be the first to review

Have you used this server?

Share your experience — it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is io.github.StuMason/polar-flow-server safe to use?: io.github.StuMason/polar-flow-server has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments.
How do I install io.github.StuMason/polar-flow-server?: io.github.StuMason/polar-flow-server can be installed by cloning its GitHub repository and following the setup instructions in the README.
What can io.github.StuMason/polar-flow-server do?: io.github.StuMason/polar-flow-server provides 7 tools: Overview, Sleep, user_id, Setup, Dashboard and 2 more. See the full tools list on the server page for descriptions and parameters.
What AI clients work with io.github.StuMason/polar-flow-server?: io.github.StuMason/polar-flow-server is compatible with claude-desktop, cursor, claude-code. It uses http transport.
Is io.github.StuMason/polar-flow-server actively maintained?: io.github.StuMason/polar-flow-server is actively maintained — last commit was 17 days ago. It has 22 GitHub stars.

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MCP Security Weekly

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Community

Discussion

Start a conversation

Ask a question, share a tip, or report an issue.

Has anyone used this with Cursor?How do you handle auth?Any alternatives?

Edit this pageView history

Health

Step 1

Install in your client

Config is the same across clients — only the file and path differ.

Supported in Claude Desktophttp · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "io-github-stumason-polar-flow-server": {
      "command": "<see-readme>",
      "args": []
    }
  }
}

Are you the author?

Add this badge to your README to show your security score and help users find safe servers.

Embed in your READMEAbout badges →

[![MCPpedia Score](https://mcppedia.org/api/badge/io-github-stumason-polar-flow-server)](https://mcppedia.org/s/io-github-stumason-polar-flow-server)

Read me

What io.github.StuMason/polar-flow-server does

Self-hosted health analytics for Polar devices — own your data, analyze it against your own baselines, and let your AI assistant read it.

Test This Server

No automated test available for this server. Check the GitHub README for setup instructions.

README

polar-flow-server

Self-hosted health analytics for Polar devices — own your data, analyze it against your own baselines, and let your AI assistant read it.

Full Documentation · MCP Server · Integration Guide · API Reference

What This Does

Your watch knows more about you than you do — and Polar's API only lets you see the last 28-30 days of it. This server syncs everything, keeps it forever, and turns it into answers:

Syncs all 13 Polar API endpoints automatically — sleep, HRV, activity, workouts, SpO2, ECG, skin temperature, the lot
Stores everything in PostgreSQL. Your data, your server, no cloud between you and it
Computes personal baselines (rolling averages, IQR anomaly bounds) so "is this normal?" means normal for you
Ships a built-in MCP server with OAuth sign-in — ask Claude "should I train hard today?" and it answers from your overnight HRV vs your baseline
Admin dashboard (HTMX), REST API, per-user API keys, multi-user ready

Ask Your AI About Your Body (MCP)

A built-in Model Context Protocol server — protocol revision 2026-07-28, streamable HTTP — runs inside the main server at /mcp. Ten curated tools cover the one-shot health assessment, sleep, recovery, activity, workouts, seven biosensing streams, personal baselines, patterns/anomalies, and sync control.

In clients that render MCP Apps (claude.ai, Claude Desktop, VS Code), asking "how am I doing?" draws an actual card in the conversation:

Connecting is a sign-in, not a paste. With BASE_URL set, the server is its own OAuth 2.1 authorization server: add https://your-server/mcp as a custom connector in Claude Desktop or claude.ai, click Connect, log in on your server, approve the consent screen. Tokens are user-scoped, expire hourly, refresh automatically, and every connected app is revocable from Settings. API keys still work for headless clients:

claude mcp add polar-health https://your-server.example.com/mcp \
  --transport http \
  --header "X-API-Key: pfk_your_key_here"

Full setup in the MCP docs.

Architecture

Polar API → polar-flow SDK → Sync Service → PostgreSQL
                                                  ↓
                                           Admin Dashboard (HTMX)
                                                  ↓
                                             REST API

Stack:

Litestar (async web framework)
SQLAlchemy 2.0 (async ORM)
PostgreSQL
HTMX + Tailwind (admin UI)
polar-flow SDK v1.5.0

Don't fancy running a server? A hosted version is in the works — join the waitlist. Self-hosting stays free forever.

Quick Start

Option 1: Docker (Recommended)

# Pull and run
curl -O https://raw.githubusercontent.com/StuMason/polar-flow-server/main/docker-compose.prod.yml
docker-compose -f doc

... [View full README on GitHub](https://github.com/stumason/polar-flow-server#readme)

Loading README…

Scored, not listed

Why this score

Five weighted categories — click any category to see the underlying evidence.

Score breakdown

35/100across 5 weighted dimensions

How we score →

0255075100

−65

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

No package registry to scan.

Inventory

Tools (7)

Click any tool to inspect its schema.

Community

Reviews

Be the first to review

Have you used this server?

Share your experience — it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is io.github.StuMason/polar-flow-server safe to use?: io.github.StuMason/polar-flow-server has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments.
How do I install io.github.StuMason/polar-flow-server?: io.github.StuMason/polar-flow-server can be installed by cloning its GitHub repository and following the setup instructions in the README.
What can io.github.StuMason/polar-flow-server do?: io.github.StuMason/polar-flow-server provides 7 tools: Overview, Sleep, user_id, Setup, Dashboard and 2 more. See the full tools list on the server page for descriptions and parameters.
What AI clients work with io.github.StuMason/polar-flow-server?: io.github.StuMason/polar-flow-server is compatible with claude-desktop, cursor, claude-code. It uses http transport.
Is io.github.StuMason/polar-flow-server actively maintained?: io.github.StuMason/polar-flow-server is actively maintained — last commit was 17 days ago. It has 22 GitHub stars.