Use Begin from Claude and ChatGPT through the Model Context Protocol.
Begin exposes a Model Context Protocol (MCP) server, so you can drive your workspace from the chat tools you already use: Claude on the web or desktop, and ChatGPT. The connection signs in with your Begin account, uses the same permissions as the web app, and is scoped to a single workspace.
Once connected, your AI client can list and manage everything you manage in the web app: positions, people, locations, departments, the schedule, and timesheets. Read tools answer immediately. Write tools (create, update, delete, approve) run under your permissions, since authorizing the connection is the consent step.
If your role doesn’t grant a permission in the web app, the same restriction applies through MCP.
You’ll see a clear “Permission denied” response on any tool call outside your scope.
The path is the same on Claude on the web (claude.ai) and Claude Desktop.
1
Open the connector setup
In Claude, go to Settings → Connectors → Add custom connector.
2
Paste the connector URL
Use https://api.begin.eu/mcp.
3
Sign in to Begin
Claude opens a browser tab. Use your normal sign-in method: phone OTP, email OTP, passkey, or
Google.
4
Approve the consent screen
Confirm the connection to finish.
Custom connectors are available on Claude Free, Pro, Max, Team, and Enterprise. Free is capped at one custom connector. On Team and Enterprise, only Owners can add connectors.
If you use Claude Code in your terminal, register Begin as a remote MCP server with one command.
claude mcp add --transport http begin https://api.begin.eu/mcp
Then run /mcp inside Claude Code to authenticate. Claude Code opens a browser window to sign in to Begin and approve the connection. Subsequent sessions reuse the cached token.
ChatGPT requires turning on Developer mode before you can create an app.
1
Open Advanced settings
In ChatGPT, click your profile picture and go to Settings → Apps → Advanced settings.
2
Turn on Developer mode
Toggle Developer mode on.
Toggle Developer mode under Settings → Apps → Advanced settings.
3
Click Create app
The button appears next to Advanced settings once Developer mode is on.
4
Enter the connector details
Use https://api.begin.eu/mcp as the MCP server URL, plus a name and short description.
Paste the Begin MCP server URL into the New app dialog.
5
Sign in to Begin
In the popup, sign in and approve the consent screen.
Custom apps are available on ChatGPT Pro, Plus, Business, Enterprise, and Education. They aren’t
available on Free. On Business, Enterprise, and Education, an admin must enable Developer mode
under Workspace Settings → Permissions & Roles → Connected Data.
Your MCP connection is pinned to whichever workspace is active the first time your client uses the connection — not at the moment you authorize it. Once pinned, switching workspace in the web app does not change the workspace your MCP client uses. This is intentional, so an automation can’t silently retarget.To operate on a different workspace from an MCP client:
1
Switch your active workspace
In the Begin web app, set the target workspace as active.
2
Revoke the existing connection
In Settings → Security → Connected MCP clients, revoke the current pin.
3
Reconnect from your MCP client
Your next request pins to the new workspace.
The whoami tool returns the workspace your client is currently pinned to, which is useful to confirm before destructive operations.
Settings → Security → Connected MCP clients shows every MCP client you’ve authorized, the workspace each is pinned to, and when each was last active. Revoke a single client or revoke all of them. Once revoked, the next request from that client returns 401 and the user has to reconnect.
