Use JustGains inside ChatGPT

ChatGPT is great at talking about training, but out of the box it knows nothing about your training. JustGains has an official ChatGPT connector that fixes that. Once connected, ChatGPT can look at your actual workout history, build workouts that land straight in your JustGains account, and answer questions like "how consistent was I this month?" with real numbers instead of guesses.

Under the hood this uses the Model Context Protocol (MCP), an open standard that lets AI assistants talk to apps securely. You do not need to know anything about it. From your side it is a one-time connection, and after that you just chat.

What you can do once connected

• Generate workouts. "Make me a 45-minute upper body workout with dumbbells only." ChatGPT builds it with real JustGains exercises and shows it as an interactive workout card right in the chat.
• Save workouts to your account. Ask it to save the plan and it appears in JustGains, ready to start on your phone.
• Review your training. Ask for your recent workout history, a summary of your week, or an analysis of how consistent you have been.
• Dig into specific lifts. "What are my top exercises?" or "show my bench press history" pulls your real logged sets.
• Track your weight. Check your weight trend, or tell ChatGPT "log 82 kg for today" and it writes the entry for you.
• Plan runs. Ask for a 5 km running route near you and it saves a real route to your Routes tab.
• Browse programs. Search JustGains workout programs and start one directly from the conversation.

How to connect JustGains to ChatGPT

You add JustGains as a connector in ChatGPT. This takes about two minutes and you only do it once.

1. In ChatGPT, open Settings, then go to Connectors.
2. Choose Create (if you do not see it, enable Developer mode under the advanced settings on that page first).
3. Name it JustGains and enter this MCP server URL: https://www.justgains.com/mcp
4. Set Authentication to OAuth, then create the connector.
5. Click Connect. You will be sent to JustGains to sign in (or approve, if you are already signed in), then bounced straight back to ChatGPT.
6. That is it. Start a new chat, and when a question involves your training, ChatGPT can use JustGains to answer it.

Things to try first

• "Build me a 3-day dumbbell program for building muscle and save the first workout to my JustGains."
• "Summarize my last week of training. What should I focus on next week?"
• "How is my squat progressing? Compare this month to last month."
• "Log my weight: 82 kg this morning."
• "Plan me an easy 5 km running loop from my usual starting point and save it as a route."

Privacy and control

When you connect, ChatGPT acts as you, using a secure sign-in (OAuth) rather than your password. ChatGPT never sees your JustGains password, and it can only reach your data while the connector is connected. Everything it saves (workouts, weight entries, routes) lands in your own account, exactly as if you had entered it in the app.

You stay in control at both ends: disconnect or delete the connector in ChatGPT settings at any time, and the access it was granted stops working. Nothing about your JustGains account changes when you disconnect; your data stays yours, in the app, as always.