The three routes
| How you set it up | Cost and limits | |
|---|---|---|
| Open-source server (mcp-gsc) | Runs on your machine with your own Google Cloud OAuth client or service account. | Free. Lists Claude Desktop, Cursor, Codex CLI, Gemini CLI and Antigravity.Source: GitHub repository |
| Hosted connector (Windsor.ai) | Sign in, pick the property, add Windsor in your assistant. | Free forever for one source, paid from $19 a month.Source: guide |
| Workspace (OneLap) | Add OneLap MCP as a connector, sign in with your OneLap login, choose the workspaces it may read. | Invite only, with a waitlist. No self-service signup and no trial. No price published and no fee charged today. |
How to choose
For one site and occasional questions, an open-source server is free and gives you full control, at the price of a Google Cloud setup. For several sources without that setup, a hosted connector is the short path. OneLap is built for a team or an agency that also wants the history of each week and a person’s approval on every decision. It is invite only.