Cursor

Cursor reads MCP servers from .cursor/mcp.json in a project or ~/.cursor/mcp.json for every project.

Install

Create or edit ~/.cursor/mcp.json:

{
  "mcpServers": {
    "sai": {
      "command": "npx",
      "args": ["-y", "@simular-ai/sai-mcp"],
      "env": {
        "SAI_API_KEY": "sapi_..."
      }
    }
  }
}

Open Cursor Settings, then MCP, and confirm sai shows its tools.

Verify

In Agent mode:

Use Sai to open Excel on my computer and create a sheet with the months of the year in column A.

Cursor asks before each tool call unless you enable auto-run for the sai server.

Tools and loop

The tool set and the start, wait, approve loop are the same as in Claude Code.

Gotchas

• Cursor has no equivalent of Claude Code channels, so there is no push mode. The agent polls through sai_task_wait.
• Put the key in ~/.cursor/mcp.json, not the project file, so it is never committed.
• Link-only approvals (Google connect, site passwords, phone verification) come back as approval_url. Open it in your browser, then let the agent call sai_task_wait again.
• sai_task_wait retries a gateway 502, 503 or 504 on its own before reporting an error.
• Each task comes with a live view of the computer's screen. See Watch Sai work.