Oura MCP Server

oura-mcp

A Model Context Protocol server for the Oura Ring API v2. Exposes sleep, activity, readiness, heart rate, and workout data to MCP-compatible clients (Claude Desktop, Claude Code, Cursor, ...) via OAuth.

Quick start

npx @yasuakiomokawa/oura-mcp configure

The wizard collects your Oura Client ID/Secret, walks through browser OAuth, saves tokens to ~/.config/oura-mcp/, and adds an mcpServers.oura entry to any detected MCP client config. Restart the client and the tools below are available.

Re-running configure pre-fills the saved Client ID / port so you only need to press Enter to keep them. Type --force to wipe saved state and start from scratch:

npx @yasuakiomokawa/oura-mcp configure --force

Prerequisites

1. Register an Oura developer app at https://cloud.ouraring.com/oauth/applications
2. Redirect URI must be exactly: http://localhost:54321/callback (or http://localhost:<port>/callback if you customize OURA_CALLBACK_PORT)
3. Enable the read scopes you need (Email, Personal info, Daily activity, Heart rate, Workout, Tag, Session, SpO2, Ring configuration, Stress, Heart health)
4. Note the Client ID and Client Secret — you'll enter them in npx @yasuakiomokawa/oura-mcp configure

Installation

Three paths depending on your client:

1. MCP Registry (auto-discovery clients)

Once published to the official MCP Registry, supported clients can install io.github.YasuakiOmokawa/oura-mcp from their UI. The wizard step still has to run once to obtain OAuth tokens.

2. Manual config (Claude Desktop / Claude Code / Cursor)

Run npx @yasuakiomokawa/oura-mcp configure — Step 4 of the wizard auto-detects:

• Claude Desktop: ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows)
• Claude Code (user): ~/.claude.json
• Claude Code (project): ./.mcp.json
• Cursor (user): ~/.cursor/mcp.json
• Cursor (project): ./.cursor/mcp.json

Each detected file is backed up to <file>.bak.<ISO-timestamp> before an atomic write.

To configure manually, add to your client config:

{
  "mcpServers": {
    "oura": {
      "command": "npx",
      "args": ["-y", "@yasuakiomokawa/oura-mcp"]
    }
  }
}

3. Skill (optional)

The companion oura-api-skill ships per-endpoint reference and three workflow recipes (weekly review / sleep trend / recovery check). Bundle it as a Claude Code plugin or import into your skills directory.

Tools provided

oura_api_get returns structuredContent with { status, data, next_token, pages_fetched, has_more }.

Configuration

Two ways, env vars take precedence over the config file:

# Option A — env vars (set both together)
OURA_CLIENT_ID=...
OURA_CLIENT_SECRET=...
OURA_CALLBACK_PORT=54321  # optional

# Option B — config file (managed by the wizard)
~/.config/oura-mcp/config.json   # 0600
~/.config/oura-mcp/tokens.json   # 0600

config.json schema:

{
  "schemaVersion": 1,
  "clientId": "...",
  "clientSecret": "...",
  "callbackPort": 54321
}

Troubleshooting

• "refresh_token expired" — run oura_authenticate (in chat) or npx @yasuakiomokawa/oura-mcp configure (in terminal).
• Port 54321 already in use — set OURA_CALLBACK_PORT=<other port> and update the redirect URI in your Oura developer app to match.
• "Path not found" — verify the path with oura_api_list_paths. Common slips: missing /v2/ prefix, typo in daily_sleep.
• Setup hangs at "Waiting for authorization" — you haven't approved in the browser yet, or the authorize page was opened in a different browser session than the one with localhost reachability.
• No log output — set OURA_LOG_LEVEL=debug for verbose stderr logging.

Security

• PKCE (S256) + cryptographic state validation on the OAuth flow.
• Tokens stored at ~/.config/oura-mcp/tokens.json with 0600 permissions, written atomically.
• Secrets (access_token, refresh_token, client_secret, code, code_verifier) are redacted from logs via utils/redact.ts.
• Network: User-Agent: oura-mcp/<version>, all requests use AbortSignal.timeout (30 s API / 10 s OAuth).
• Local callback listener binds 127.0.0.1:54321 only; redirect URI uses the loopback name localhost for Oura compatibility.
• Released to npm with provenance.

Development

git clone https://github.com/YasuakiOmokawa/oura-mcp.git
cd oura-mcp
npm install
npm test
npm run build

Useful scripts:

• npm run lint / npm run typecheck — Biome + TypeScript checks
• npm run test:coverage — Vitest with V8 coverage
• npm run update:docs — re-fetch the Oura OpenAPI schema and regenerate skills/oura-api-skill/references/

License

MIT

日本語の方へ

Oura Ring の API v2 を MCP 経由で扱うためのサーバーです。npx @yasuakiomokawa/oura-mcp configure 一発で OAuth 認可からクライアント設定追記まで完了します。Claude Desktop / Claude Code / Cursor を自動検出するので、対応クライアントを使っていれば手動編集は不要です。トークンは ~/.config/oura-mcp/ に 0600 で保存され、refresh_token 失効時はチャットから oura_authenticate を呼べば再認可できます。詳しくは上記 Troubleshooting を参照してください。