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mcp/harbor
VS Code

MCP Composer for VS Code

io.github.oaslananka/composer

Aggregate multiple MCP backends behind a single stdio endpoint with namespaced routing.

client:VS Code transport:stdio runtime:npm

Install MCP Composer in VS Code

.vscode/mcp.json 

{
  "inputs": [
    {
      "type": "promptString",
      "id": "composer-config",
      "description": "COMPOSER_CONFIG",
      "password": true
    }
  ],
  "servers": {
    "composer": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@oaslananka/composer"
      ],
      "env": {
        "COMPOSER_CONFIG": "${input:composer-config}"
      }
    }
  }
}

VS Code prompts for each input the first time the server starts, so no secret is written to the file. VS Code docs

MCP Composer in other clients

MCP Composer MCP server