Fix: Support multiple concurrent HTTP transports

src/mcp/mcp-server.ts

@@ -0,0 +1,29 @@
+import { Server } from "@modelcontextprotocol/sdk/server/index.js";
+import { setupTools } from "./register-tools.js";
+
+// Singleton server instance for backward compatibility
+let mcpServer: Server | null = null;
+
+// Factory function to create a new MCP server instance
+// This allows multiple concurrent HTTP transports without the "Already connected" error
+export const createMcpServer = (): Server => {
+    const server = new Server({
+        name: 'ChromeMcpServer',
+        version: '1.0.0',
+    }, {
+        capabilities: {
+            tools: {},
+        },
+    });
+    setupTools(server);
+    return server;
+};
+
+// Legacy singleton getter for backward compatibility with stdio transport
+export const getMcpServer = (): Server => {
+    if (mcpServer) {
+        return mcpServer;
+    }
+    mcpServer = createMcpServer();
+    return mcpServer;
+};