This is my `mcp.json` in VS Code (requires `uvx` and `npx` to be available):

  {
   "servers": {
    "context7": {
     "command": "npx",
     "args": [
      "-y",
      "@upstash/context7-mcp"
     ],
     "type": "stdio"
    },
    "fetch": {
     "command": "uvx",
     "args": [
      "mcp-server-fetch"
     ],
     "type": "stdio"
    },
    "git": {
     "command": "uvx",
     "args": [
      "mcp-server-git"
     ],
     "type": "stdio"
    },
    "playwright": {
     "command": "npx",
     "args": [
      "@playwright/mcp@latest"
     ],
     "type": "stdio"
    },
    "brave-search": {
     "command": "npx",
     "args": [
      "-y",
      "@modelcontextprotocol/server-brave-search"
     ],
     "env": {
      "BRAVE_API_KEY": "${input:brave-api-key}"
     },
     "type": "stdio"
    }
   },
   "inputs": [
    {
     "type": "promptString",
     "id": "brave-api-key",
     "description": "Brave Data for AI API Key",
     "password": true
    }
   ]
  }

The Sonnet 4 agent usually defaults to using `fetch` for getting webpages, but I've seen it sometimes try playwright on it's own. It seems the brave-search MCP server is deprecated now, so actually it's probably not the best option as a search MCP (you also need to sign up for an API key), right now it works well though!