Connect Myosin to your AI

What this is

Myosin exposes your data through the Model Context Protocol (MCP), an open standard that AI clients use to connect to external services. You connect it once and your assistant can read your training history to answer whatever you ask.

We chose this instead of putting a chatbot inside the app on purpose. A chatbot would force us to decide what to recommend and how — and Myosin is a tracker, not a coach. This way you pick the question, the model and the moment; we hand over the data and step aside.

Setup

Add this URL as a custom connector:

https://mcp.getmyosin.com

• Claude — Settings → Connectors → Add custom connector. Works on Free (one connector), Pro, Max, Team and Enterprise.
• ChatGPT — Developer Mode. Available on Pro, Plus, Business, Enterprise and Education.

Your client will send you to a Myosin screen to sign in and authorize. You approve there, and you're connected.

What it can read

What it can write — and only if you allow it

Creating and editing routines. Nothing else. Writing starts OFF: you turn it on per connection in the app, in Settings → AI connections. And every single write shows you what it's about to save and waits for your confirmation.

Try asking

• My bench press stalled six weeks ago. Show me what changed.
• Which muscle have I neglected over the last three months?
• On the weeks I hit my sleep habit, did I train more volume?
• Build me a push routine based on what I've already been doing.

Known limits

• It deletes nothing. Not routines, not sessions: that happens in the app.
• It doesn't log workouts. Logging sets happens in the app, with your phone in hand.
• It doesn't edit habits or activities. Read-only.
• It sees data up to your last sync. If you trained offline and haven't opened the app, that hasn't reached the server yet — which is why every response carries a freshness stamp.
• Myosin doesn't give opinions. The tools return data; the advice comes from your model, not from us.

One more thing worth knowing: when you ask it to compare two things over time, it hands your assistant the raw series and nothing else — no correlation number. With a few months of data any such number would be noise with two decimals, and it would get read as a fact.

Privacy

The connection reads your own data, with your own account, and only when you ask your assistant something. Myosin never sends your data anywhere on its own. You can revoke a connection at any time from the app, and it stops reading immediately.

Full detail: AI connections privacy.