"Understanding OAuth 2.0 Protocol" matching MCP connectors:

Garmin data in Claude & ChatGPT via the Garmin Health API. OAuth sign-in, no password sharing.

WHOOP recovery, strain, sleep and workouts in Claude via official WHOOP OAuth. Free, open source.

Remote MCP server for training, nutrition, wellness, and performance data with OAuth 2.0.

The first strength-training app Claude can write to — reads real workout history, writes planned workouts back. First-party, OAuth 2.1, free.

Pace is a remote MCP server that exposes wearable and fitness data to Claude via the Model Context Protocol. It connects to Garmin, Oura, Whoop, Polar, Fitbit and 20+ devices and provides 15 tools for querying sleep, activity, recovery, and training data. Hosted on Google Cloud Run, OAuth 2.1 authentication, Streamable HTTP transport. Instructions: First you need to create an account at: https://pacetraining.co and connect your wearables. After that you can connect the remote Server via Custom Connector in Claude and OAuth 2.1 Flow startet.

Multi-tenant hosted MCP server for Oura Ring — 21 read-only tools, OAuth per user.