Connect your AI

Every AI client connects to the same address:

https://mcp.parameterfit.com/mcp

The same URL, with setup instructions, lives in the app under Settings, AI Connection, Setup instructions. It appears after a one-time consent screen that spells out exactly what a connected AI can read and change. The AI Connection is the app’s one paid feature. There is a 14-day trial available for this feature.

How the sign-in works, for every client

Whichever client you use, adding the connector ends the same way: a sign-in window opens and Apple asks you to sign in to iCloud. Use the same Apple account as the iPhone where Parameter is installed. That account is where your data lives. Using a different one would connect your AI to an empty database. The sign-in happens on Apple’s page. Parameter never sees your Apple ID password.

Claude

Parameter is listed in the Claude connector directory, so on Claude there is nothing to paste. A directory connector also does not use the free plan’s one custom connector slot, which makes it the better route on every plan. Set it up once on the web or desktop app and it will follow your account to Claude on iOS and Android.

Through the connector directory

1. In Claude on the web or desktop, click your initials in the bottom-left corner, then Settings, then Connectors.
2. Click Add, then Browse connectors. Search for Parameter and choose Connect.
3. Once the sign-in window opens, sign in with the same Apple account as your phone and check “Keep me signed in” if it is available.
4. In any chat, click the + button at the lower left, choose Connectors, and switch Parameter on. It will probably be on by default.
5. Try it: “Read my workout profile and plan my week.”

Adding it manually as a custom connector

Claude’s free plan allows one custom connector. Paid plans allow more.

1. Copy the endpoint URL above.
2. In Claude on the web or desktop, click your initials in the bottom-left corner, then Settings, then Connectors.
3. Click Add, then Add custom connector. Name it Parameter, paste the URL into the server URL field, and click Add. Nothing else on the form is needed.
4. Once the sign-in window opens, sign in with the same Apple account as your phone and check “Keep me signed in” if it is available.
5. In any chat, click the + button at the lower left, choose Connectors, and switch Parameter on. It will probably be on by default.
6. Try it: “Read my workout profile and plan my week.”

Claude also lets you set a permission per tool (always allow, ask each time, or deny). See “Tool permissions” below.

ChatGPT

Custom connectors in ChatGPT live behind Developer mode, on a paid plan (Plus, Pro, Business, Enterprise or Edu). Set it up at chatgpt.com. The connector belongs to your account, and works in ChatGPT’s desktop and mobile apps wherever OpenAI currently allows developer-mode connectors.

1. Copy the endpoint URL above.
2. Open Settings, Apps & Connectors, Advanced settings, and turn on Developer mode, then start a new chat so the tools menu picks it up.
3. Back in Apps & Connectors, choose Create, name the connector Parameter, paste the URL, and save.
4. Sign in with the same Apple account as your phone and check “Keep me signed in” if it is available.
5. In a chat, tap + in the message box, choose Developer mode, and enable Parameter for that conversation.
6. Try it: “Read my workout profile and plan my week.”

Perplexity

Perplexity added custom remote connectors in early 2026, on paid plans (Pro, Max, or Enterprise).

1. Copy the endpoint URL above.
2. Open Settings, Connectors, then Add a connector, then Custom MCP server.
3. Name it Parameter, paste the URL as the MCP server URL, pick OAuth for authentication and Streamable HTTP for transport.
4. Add it, then open the new Parameter card to run the sign-in. Use the same Apple account as your phone.
5. Try it: “Read my workout profile and plan my week.”

Microsoft Copilot

The everyday Copilot app can’t take user-added MCP servers. Connections go through an agent built in Copilot Studio, on Microsoft 365 Copilot plans. If you just use the free Copilot app, pick one of the other clients instead.

1. In Copilot Studio, open or create an agent, then Tools, Add a tool, New tool, Model Context Protocol.
2. Put Parameter for the server name and fill in a description, paste the endpoint URL as the server URL, and create the connection.
3. Sign in with the same Apple account as your phone.
4. Chat with that agent to read your profile and plan your week.

Google Gemini

Gemini’s consumer app gained bring-your-own-URL custom connectors in mid-2026. Those custom apps run in Gemini Spark rather than ordinary Gemini chat, and the rollout hasn’t reached every account or region yet. If you don’t see the menu, that’s why.

1. Copy the endpoint URL above.
2. At gemini.google.com, open Settings & help, Connected Apps, then add a custom app.
3. Paste the URL as the MCP server URL and continue.
4. Sign in with the same Apple account as your phone.
5. Ask Gemini Spark to read your workout profile and plan your week.

xAI Grok

Grok takes bring-your-own-URL connectors at grok.com. One setup covers the Grok web, iOS, and Android clients; it isn’t per-platform.

1. Copy the endpoint URL above.
2. At grok.com/connectors, choose New Connector, then Custom.
3. Name it Parameter, paste the URL as the MCP server URL, and save.
4. Sign in with the same Apple account as your phone.
5. Ask Grok to read your workout profile and plan your week.

Any other MCP client

Any client that supports remote MCP servers over streamable HTTP can connect. Look for “custom connector” or “MCP server” in its settings, give it the endpoint URL, and it walks you through the iCloud sign-in. Your data stays in your own iCloud. The connection reads and writes it on your behalf, and you can revoke any client in the app anytime.

Tool permissions, after you connect

Once connected, your client lists the individual tools Parameter exposes, and most clients let you set a permission per tool: always allow, ask each time, or deny.

Read-only tools: get_schema, get_profile, get_equipment, get_current_plan, get_history, get_workout_log. Safe to set to always allow. They can only look.

Write tools: push_plan, push_workout, update_workout, delete_workout. Keep these on ask each time if you want to review plans before they land. They can never touch your logs, profile, or equipment either way.

Staying in control

The new-client notice

When a new AI client connects, Parameter flags it in Settings: “A new AI client connected to your workout data. Not you? Revoke it.” If you just set it up, dismiss it. If you didn’t, revoke it right there.

The connected-clients list

Settings, AI Connection lists every connected client with its last-access time. Revoke any of them; the block takes effect within about a minute and holds until you allow it again.

What AI clients can do

Read your profile, goals, equipment, and heart-rate zones; read your workout history and logs; create and update plans and workouts. It can never write your logs, your profile, or your equipment. The full scope is shown in the app before the endpoint is ever revealed, and again anytime under “What your AI can access.”