Sign-in
You sign in with Intervals.icu’s own OAuth. There is no API key to copy, and no assistant ever holds your credential: each gets a token of its own, which you can revoke from your workspace.
Intervals.icu × the AI you already use
Your training.
Your AI of choice.
Your Intervals.icu training belongs in the assistant that already knows you. One secure connection puts your history into Claude, ChatGPT, or Grok — or any other assistant that supports remote MCP — and into whatever you switch to next. Each links only the account you authorize. Every new Free account starts with 14 days of full read and write access, and Pro keeps it, up to 300 Intervals.icu calls a day.
Underneath, it is a hosted Intervals.icu MCP server: one URL, OAuth sign-in, nothing to install or self-host.
Claude, ChatGPT, Grok14 days full accessWrites need confirmation
Your workspace
Connect your training
IntervalSync is available to Intervals.icu athletes. Sign in once, then use your training in whichever assistant you prefer.
Continue with Intervals.icu
Sign in to Intervals.icu once. We create or open your IntervalSync account and connect your training automatically — no API key or separate password required.
By continuing you agree to the terms of service, and our privacy policy explains what we keep.
What it is
A hosted MCP server for Intervals.icu.
IntervalSync connects your training to an AI assistant through the Model Context Protocol (MCP), the protocol assistants use to reach outside tools. It runs at one address, so there is nothing to install or keep running on your own machine. The setup guides cover Claude, Claude Code, ChatGPT, Gemini, Grok, Mistral Vibe, Cursor and Zed.
What it reads
Activities and their intervals, per-second streams, wellness, planned workouts, fitness and load, and your zones. Each is read when the assistant asks, and none of it is stored.
What it writes
It can add, change or delete a planned workout and update a wellness entry, each only after you confirm the exact change. Writes come with the 14-day trial, Pro and the Coach plans.
How the MCP server worksSetup guides and promptsPlans and daily limits