Refactor server startup functions

Rename `startServer` to `startStreamableHTTPServer` and add a new
`startStdioServer` helper to make the transport type explicit. Remove
the `ServerOptions` interface in favor of reading `PORT` directly from
the environment inside the function (defaulting to `3001`).

Also update Python examples to default to port `3001` for consistency.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: jonathanhefner

examples/basic-server-preact/main.ts

@@ -4,10 +4,6 @@
  * Or: node dist/index.js [--stdio]
  */
 
-/**
- * Shared utilities for running MCP servers with Streamable HTTP transport.
- */
-
 import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
 import { createMcpExpressApp } from "@modelcontextprotocol/sdk/server/express.js";
 import type { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
@@ -16,22 +12,15 @@ import cors from "cors";
 import type { Request, Response } from "express";
 import { createServer } from "./server.js";
 
-export interface ServerOptions {
-  port: number;
-  name?: string;
-}
-
 /**
  * Starts an MCP server with Streamable HTTP transport in stateless mode.
  *
  * @param createServer - Factory function that creates a new McpServer instance per request.
- * @param options - Server configuration options.
  */
-export async function startServer(
+export async function startStreamableHTTPServer(
   createServer: () => McpServer,
-  options: ServerOptions,
 ): Promise<void> {
-  const { port, name = "MCP Server" } = options;
+  const port = parseInt(process.env.PORT ?? "3001", 10);
 
   const app = createMcpExpressApp({ host: "0.0.0.0" });
   app.use(cors());
@@ -67,7 +56,7 @@ export async function startServer(
       console.error("Failed to start server:", err);
       process.exit(1);
     }
-    console.log(`${name} listening on http://localhost:${port}/mcp`);
+    console.log(`MCP server listening on http://localhost:${port}/mcp`);
   });
 
   const shutdown = () => {
@@ -79,12 +68,22 @@ export async function startServer(
   process.on("SIGTERM", shutdown);
 }
 
+/**
+ * Starts an MCP server with stdio transport.
+ *
+ * @param createServer - Factory function that creates a new McpServer instance.
+ */
+export async function startStdioServer(
+  createServer: () => McpServer,
+): Promise<void> {
+  await createServer().connect(new StdioServerTransport());
+}
+
 async function main() {
   if (process.argv.includes("--stdio")) {
-    await createServer().connect(new StdioServerTransport());
+    await startStdioServer(createServer);
   } else {
-    const port = parseInt(process.env.PORT ?? "3001", 10);
-    await startServer(createServer, { port, name: "Basic MCP App Server (Preact)" });
+    await startStreamableHTTPServer(createServer);
   }
 }
 

examples/basic-server-react/main.ts

@@ -12,22 +12,15 @@ import cors from "cors";
 import type { Request, Response } from "express";
 import { createServer } from "./server.js";
 
-export interface ServerOptions {
-  port: number;
-  name?: string;
-}
-
 /**
  * Starts an MCP server with Streamable HTTP transport in stateless mode.
  *
  * @param createServer - Factory function that creates a new McpServer instance per request.
- * @param options - Server configuration options.
  */
-export async function startServer(
+export async function startStreamableHTTPServer(
   createServer: () => McpServer,
-  options: ServerOptions,
 ): Promise<void> {
-  const { port, name = "MCP Server" } = options;
+  const port = parseInt(process.env.PORT ?? "3001", 10);
 
   const app = createMcpExpressApp({ host: "0.0.0.0" });
   app.use(cors());
@@ -63,7 +56,7 @@ export async function startServer(
       console.error("Failed to start server:", err);
       process.exit(1);
     }
-    console.log(`${name} listening on http://localhost:${port}/mcp`);
+    console.log(`MCP server listening on http://localhost:${port}/mcp`);
   });
 
   const shutdown = () => {
@@ -75,12 +68,22 @@ export async function startServer(
   process.on("SIGTERM", shutdown);
 }
 
+/**
+ * Starts an MCP server with stdio transport.
+ *
+ * @param createServer - Factory function that creates a new McpServer instance.
+ */
+export async function startStdioServer(
+  createServer: () => McpServer,
+): Promise<void> {
+  await createServer().connect(new StdioServerTransport());
+}
+
 async function main() {
   if (process.argv.includes("--stdio")) {
-    await createServer().connect(new StdioServerTransport());
+    await startStdioServer(createServer);
   } else {
-    const port = parseInt(process.env.PORT ?? "3001", 10);
-    await startServer(createServer, { port, name: "Basic MCP App Server (React)" });
+    await startStreamableHTTPServer(createServer);
   }
 }
 

examples/basic-server-solid/main.ts

@@ -4,10 +4,6 @@
  * Or: node dist/index.js [--stdio]
  */
 
-/**
- * Shared utilities for running MCP servers with Streamable HTTP transport.
- */
-
 import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
 import { createMcpExpressApp } from "@modelcontextprotocol/sdk/server/express.js";
 import type { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
@@ -16,22 +12,15 @@ import cors from "cors";
 import type { Request, Response } from "express";
 import { createServer } from "./server.js";
 
-export interface ServerOptions {
-  port: number;
-  name?: string;
-}
-
 /**
  * Starts an MCP server with Streamable HTTP transport in stateless mode.
  *
  * @param createServer - Factory function that creates a new McpServer instance per request.
- * @param options - Server configuration options.
  */
-export async function startServer(
+export async function startStreamableHTTPServer(
   createServer: () => McpServer,
-  options: ServerOptions,
 ): Promise<void> {
-  const { port, name = "MCP Server" } = options;
+  const port = parseInt(process.env.PORT ?? "3001", 10);
 
   const app = createMcpExpressApp({ host: "0.0.0.0" });
   app.use(cors());
@@ -67,7 +56,7 @@ export async function startServer(
       console.error("Failed to start server:", err);
       process.exit(1);
     }
-    console.log(`${name} listening on http://localhost:${port}/mcp`);
+    console.log(`MCP server listening on http://localhost:${port}/mcp`);
   });
 
   const shutdown = () => {
@@ -79,12 +68,22 @@ export async function startServer(
   process.on("SIGTERM", shutdown);
 }
 
+/**
+ * Starts an MCP server with stdio transport.
+ *
+ * @param createServer - Factory function that creates a new McpServer instance.
+ */
+export async function startStdioServer(
+  createServer: () => McpServer,
+): Promise<void> {
+  await createServer().connect(new StdioServerTransport());
+}
+
 async function main() {
   if (process.argv.includes("--stdio")) {
-    await createServer().connect(new StdioServerTransport());
+    await startStdioServer(createServer);
   } else {
-    const port = parseInt(process.env.PORT ?? "3001", 10);
-    await startServer(createServer, { port, name: "Basic MCP App Server (Solid)" });
+    await startStreamableHTTPServer(createServer);
   }
 }
 

examples/basic-server-svelte/main.ts

@@ -4,10 +4,6 @@
  * Or: node dist/index.js [--stdio]
  */
 
-/**
- * Shared utilities for running MCP servers with Streamable HTTP transport.
- */
-
 import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
 import { createMcpExpressApp } from "@modelcontextprotocol/sdk/server/express.js";
 import type { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
@@ -16,22 +12,15 @@ import cors from "cors";
 import type { Request, Response } from "express";
 import { createServer } from "./server.js";
 
-export interface ServerOptions {
-  port: number;
-  name?: string;
-}
-
 /**
  * Starts an MCP server with Streamable HTTP transport in stateless mode.
  *
  * @param createServer - Factory function that creates a new McpServer instance per request.
- * @param options - Server configuration options.
  */
-export async function startServer(
+export async function startStreamableHTTPServer(
   createServer: () => McpServer,
-  options: ServerOptions,
 ): Promise<void> {
-  const { port, name = "MCP Server" } = options;
+  const port = parseInt(process.env.PORT ?? "3001", 10);
 
   const app = createMcpExpressApp({ host: "0.0.0.0" });
   app.use(cors());
@@ -67,7 +56,7 @@ export async function startServer(
       console.error("Failed to start server:", err);
       process.exit(1);
     }
-    console.log(`${name} listening on http://localhost:${port}/mcp`);
+    console.log(`MCP server listening on http://localhost:${port}/mcp`);
   });
 
   const shutdown = () => {
@@ -79,12 +68,22 @@ export async function startServer(
   process.on("SIGTERM", shutdown);
 }
 
+/**
+ * Starts an MCP server with stdio transport.
+ *
+ * @param createServer - Factory function that creates a new McpServer instance.
+ */
+export async function startStdioServer(
+  createServer: () => McpServer,
+): Promise<void> {
+  await createServer().connect(new StdioServerTransport());
+}
+
 async function main() {
   if (process.argv.includes("--stdio")) {
-    await createServer().connect(new StdioServerTransport());
+    await startStdioServer(createServer);
   } else {
-    const port = parseInt(process.env.PORT ?? "3001", 10);
-    await startServer(createServer, { port, name: "Basic MCP App Server (Svelte)" });
+    await startStreamableHTTPServer(createServer);
   }
 }
 

examples/basic-server-vanillajs/main.ts

@@ -4,10 +4,6 @@
  * Or: node dist/index.js [--stdio]
  */
 
-/**
- * Shared utilities for running MCP servers with Streamable HTTP transport.
- */
-
 import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
 import { createMcpExpressApp } from "@modelcontextprotocol/sdk/server/express.js";
 import type { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
@@ -16,22 +12,15 @@ import cors from "cors";
 import type { Request, Response } from "express";
 import { createServer } from "./server.js";
 
-export interface ServerOptions {
-  port: number;
-  name?: string;
-}
-
 /**
  * Starts an MCP server with Streamable HTTP transport in stateless mode.
  *
  * @param createServer - Factory function that creates a new McpServer instance per request.
- * @param options - Server configuration options.
  */
-export async function startServer(
+export async function startStreamableHTTPServer(
   createServer: () => McpServer,
-  options: ServerOptions,
 ): Promise<void> {
-  const { port, name = "MCP Server" } = options;
+  const port = parseInt(process.env.PORT ?? "3001", 10);
 
   const app = createMcpExpressApp({ host: "0.0.0.0" });
   app.use(cors());
@@ -67,7 +56,7 @@ export async function startServer(
       console.error("Failed to start server:", err);
       process.exit(1);
     }
-    console.log(`${name} listening on http://localhost:${port}/mcp`);
+    console.log(`MCP server listening on http://localhost:${port}/mcp`);
   });
 
   const shutdown = () => {
@@ -79,12 +68,22 @@ export async function startServer(
   process.on("SIGTERM", shutdown);
 }
 
+/**
+ * Starts an MCP server with stdio transport.
+ *
+ * @param createServer - Factory function that creates a new McpServer instance.
+ */
+export async function startStdioServer(
+  createServer: () => McpServer,
+): Promise<void> {
+  await createServer().connect(new StdioServerTransport());
+}
+
 async function main() {
   if (process.argv.includes("--stdio")) {
-    await createServer().connect(new StdioServerTransport());
+    await startStdioServer(createServer);
   } else {
-    const port = parseInt(process.env.PORT ?? "3102", 10);
-    await startServer(createServer, { port, name: "Basic MCP App Server (Vanilla JS)" });
+    await startStreamableHTTPServer(createServer);
   }
 }