Intervals.icu MCP Server

Model Context Protocol (MCP) server for connecting Claude and ChatGPT with the Intervals.icu API. It provides tools for authentication and data retrieval for activities, events, wellness data, power curves, and custom items.

If you find the Model Context Protocol (MCP) server useful, please consider supporting its continued development with a donation.

Requirements

• Python 3.12 or higher
• Model Context Protocol (MCP) Python SDK
• httpx
• python-dotenv

Setup

1. Install uv (recommended)

macOS/Linux:

curl -LsSf https://astral.sh/uv/install.sh | sh

Windows (PowerShell):

powershell -ExecutionPolicy ByPass -c "irm https://astral.sh/uv/install.ps1 | iex"

After installation, find the full path to uv — you'll need it later when configuring Claude Desktop:

where.exe uv
# Example output: C:\Users\<USERNAME>\.local\bin\uv.exe

2. Clone this repository

git clone https://github.com/mvilanova/intervals-mcp-server.git
cd intervals-mcp-server

3. Create and activate a virtual environment

# Create virtual environment with Python 3.12
uv venv --python 3.12

# Activate virtual environment
# On macOS/Linux:
source .venv/bin/activate
# On Windows:
.venv\Scripts\activate

4. Sync project dependencies

uv sync

5. Set up environment variables

Make a copy of .env.example and name it .env by running the following command:

macOS/Linux:

cp .env.example .env

Windows (PowerShell):

Copy-Item .env.example .env

Then edit the .env file and set your Intervals.icu athlete id and API key:

API_KEY=your_intervals_api_key_here
ATHLETE_ID=your_athlete_id_here

Getting your Intervals.icu API Key

1. Log in to your Intervals.icu account
2. Go to Settings > API
3. Generate a new API key

Finding your Athlete ID

Your athlete ID is typically visible in the URL when you're logged into Intervals.icu. It looks like:

• https://intervals.icu/athlete/i12345/... where i12345 is your athlete ID

Updating

This project is actively developed, with new features and fixes added regularly. To stay up to date, follow these steps:

1. Pull the latest changes from main

⚠️ Make sure you don't have uncommitted changes before running this command.

macOS/Linux:

git checkout main && git pull

Windows (PowerShell):

git checkout main; git pull

2. Update Python dependencies

Activate your virtual environment and sync dependencies:

macOS/Linux:

source .venv/bin/activate
uv sync

Windows (PowerShell):

.venv\Scripts\activate
uv sync

Troubleshooting

If Claude Desktop fails due to configuration changes, follow these steps:

1. Delete the existing Intervals.icu entry in claude_desktop_config.json.
2. Reconfigure Claude Desktop from the intervals-mcp-server directory.

macOS/Linux:

mcp install src/intervals_mcp_server/server.py --name "Intervals.icu" --with-editable . --env-file .env

Windows: Re-add the entry manually as described in the Windows configuration section.

Common errors

spawn uv ENOENT — Claude Desktop cannot find the uv executable. Use the full path to uv in the command field. Run which uv (macOS/Linux) or where.exe uv (Windows) to get it.

spawn /Users/... ENOENT on Windows — The config file contains a macOS/Linux-style path. Replace it with the correct Windows path using backslashes as described in the Windows configuration section below.

Windows Store install: config changes not taking effect — You may be editing the wrong config file. Claude Desktop installed from the Microsoft Store reads from AppData\Local\Packages\Claude_pzs8sxrjxfjjc\LocalCache\Roaming\Claude\claude_desktop_config.json, not `AppData\Roaming\Claude\

... View full README on GitHub