MCP proxy for OpenCtx

This is a context provider for OpenCtx that fetches contents from a MCP provider for use as context.

Currently, only MCP over stdio is supported (HTTP is not yet supported).

Development

1. Clone the modelcontextprotocol/servers repository. Follow the instructions there to build the example providers. This should generate output files of the form build/${example_name}/index.js.
2. Run pnpm watch in this directory.
3. Add the following to your VS Code settings:

   "openctx.providers": {
       // ...other providers...
       "https://openctx.org/npm/@openctx/modelcontextprotocol": {
           "nodeCommand": "node",
           "mcp.provider.uri": "file:///path/to/servers/root/build/everything/index.js",
       }
   }

4. Reload the VS Code window. You should see servers/everything in the @-mention dropdown.

To hook up to the Postgres MCP provider, use:

"openctx.providers": {
    // ...other providers...
    "https://openctx.org/npm/@openctx/modelcontextprotocol": {
        "nodeCommand": "node",
        "mcp.provider.uri": "file:///path/to/servers/root/build/postgres/index.js",
        "mcp.provider.args": [
            "postgresql://sourcegraph:sourcegraph@localhost:5432/sourcegraph"
        ]
    }
}

More MCP Servers

The following MCP servers are available in the modelcontextprotocol/servers repository:

• Brave Search - Search the Brave search API
• Postgres - Connect to your Postgres databases to query schema information and write optimized SQL
• Filesystem - Access files on your local machine
• Everything - A demo server showing MCP capabilities
• Google Drive - Search and access your Google Drive documents
• Google Maps - Get directions and information about places
• Memo - Access your Memo notes
• Git - Get git history and commit information
• Puppeteer - Control headless Chrome for web automation
• SQLite - Query SQLite databases

Creating your own MCP server

See the MCP docs for how to create your own MCP servers.