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Connect ChatGPT or Claude to Agents4 Fitness

Coaches on the Architect plan can run their coaching from ChatGPT or Claude. Add Agents4 Fitness as a custom connector with the server URL below, then sign in with the same username and password you use in the Agents4 Fitness app and approve the connection.

What you need

  • An Agents4 Fitness coach account on the Architect plan ($199/mo or $1,990/yr). The free pilot, Solo and Studio do not include connecting an AI app. To upgrade, open the app and go to More → Connect ChatGPT & Claude → Upgrade to Architect.
  • Your Agents4 Fitness username and password, the ones you sign in to the app with.
  • ChatGPT or Claude on a plan that lets you add custom connectors.

The server URL

https://api.agents4.com/mcp/http

The app shows the same URL with a Copy button under More → Connect ChatGPT & Claude.

Connect Claude

  1. In Claude (claude.ai or the desktop app), open Settings → Connectors → Add custom connector.
  2. Name it Agents4 Fitness and paste the server URL. Leave the advanced OAuth fields empty.
  3. Select Connect. The Agents4 Fitness sign-in page opens: sign in with your username and password.
  4. Approve the connection. In a chat, turn on Agents4 Fitness from the tools menu.

Connect ChatGPT

  1. In ChatGPT, open Settings → Apps & Connectors → Advanced settings and turn on Developer mode.
  2. Back in Apps & Connectors, select Create, name it Agents4 Fitness and paste the server URL.
  3. Choose OAuth as the authentication, confirm you trust the app and select Create.
  4. The Agents4 Fitness sign-in page opens: sign in with your username and password, then approve. In a chat, add Agents4 Fitness from the + menu.

Signing in and approving

  • The sign-in page is on app.agents4fitness.com. Check the address before you type your password.
  • Sign in with your coach account. If you use a client account, the page asks you to switch.
  • On the approval screen you choose whether the AI app may make changes (build and update agents, change client plans) or only read.

Things to ask first

  • "How did my clients do this week? Who should I check on?"
  • "Here's my 12-week program (PDF). Build my coaching agent from it exactly as written."
  • "Swap Tuesday's lunges for Bulgarian split squats for everyone on my hypertrophy program."

Trouble connecting?

  • "An active Architect plan or MCP subscription is required." Your account is not on Architect yet. Upgrade in the app, then start the connection again from ChatGPT or Claude.
  • "This is a client account." Select Switch account and sign in with your coach username and password.
  • "This connection request expired." The sign-in page is valid for 10 minutes. Start again from your AI app.
  • Forgot your password? Select Forgot password on the sign-in page. Changing your password disconnects your AI apps, so connect them again afterwards.
  • Asked to sign in again? A connection lasts 30 days, and ends sooner if your Architect plan ends. Sign in again the same way.

Disconnect an app

In the Agents4 Fitness app, open More → Connect ChatGPT & Claude and select Disconnect next to the app. It loses access straight away.

Using Claude Code, Cursor or VS Code?

Code editors connect with an API key instead of a sign-in. In the app, open More → Connect ChatGPT & Claude → Generate API Key and paste the configuration it shows.

Open the app See coach plans

ChatGPT and Claude rename their settings menus from time to time; if a name differs, look for custom connectors. Agents4 Fitness is not affiliated with OpenAI or Anthropic.

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