Generate the Polar OAuth authorization URL. Use this to start the OAuth flow and get an authorization code. Requires your Polar API client ID from https://admin.polaraccesslink.com/

Exchange an OAuth authorization code for an access token. Returns the POLAR_ACCESS_TOKEN and POLAR_USER_ID needed to configure the MCP server.

Register a new user with the Polar AccessLink API. This creates a link between your application and the Polar user.

Get information about the registered Polar user including registration date, name, and physical attributes.

Get exercises from the last 30 days. Optionally filter by date range or include preprocessed sample metrics (heart rate stats, speed splits, power, altitude, etc.). Always returns heart rate zones and training load data.

Download exercise data to a file in FIT, TCX, or GPX format. The format is determined by the file extension. GPX is only available for exercises with GPS data.

Get daily activity summaries from the last 28 days with preprocessed hourly step buckets and zone duration breakdowns. Optionally filter by date range.

List physical information entries including weight, height, heart rate zones, and VO2 max. Creates a temporary transaction to pull data (not committed, so data remains available for future pulls).

Get continuous heart rate data for a date range with preprocessed half-hourly buckets (avg/min/max). Always returns heart rate zone summaries and daily statistics.

List sleep records including sleep score, duration, and sleep stages (light, deep, REM). Always returns heart rate stats and sleep architecture summary from preprocessed hypnogram and heart rate samples.

List nightly recharge data including ANS charge, HRV, and recovery metrics. Always returns preprocessed sample data (heart rate stats, HRV min/max/trend, breathing rate min/max/trend) positioned alongside existing API averages.

Get daily cardio load metrics including strain, tolerance, load ratio, and load level thresholds. Returns last 28 days by default, or a custom date range.

Get SleepWise alertness data including alertness grade, classification, and sleep inertia. Returns last 28 days by default, or a custom date range. Set hourly=true to include hourly alertness breakdowns.