chore: update dependencies and refactor server types to use McpServer (#38)

Author: hardikrathod777

package.json

@@ -21,7 +21,7 @@
   "files": ["build"],
   "keywords": ["mcp", "mermaid", "data-visualization", "chart", "diagram"],
   "dependencies": {
-    "@modelcontextprotocol/sdk": "^1.11.4",
+    "@modelcontextprotocol/sdk": "^1.27.1",
     "cors": "^2.8.5",
     "express": "^5.1.0",
     "mermaid-isomorphic": "^3.0.4",
@@ -31,7 +31,7 @@
   },
   "devDependencies": {
     "@biomejs/biome": "1.9.4",
-    "@modelcontextprotocol/inspector": "^0.12.0",
+    "@modelcontextprotocol/inspector": "^0.21.1",
     "@types/cors": "^2.8.19",
     "@types/express": "^5.0.3",
     "@types/node": "^22.15.21",

src/server.ts

@@ -1,7 +1,6 @@
 import * as fs from "node:fs";
-import * as os from "node:os";
 import * as path from "node:path";
-import { Server } from "@modelcontextprotocol/sdk/server/index.js";
+import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
 import {
   CallToolRequestSchema,
   ErrorCode,
@@ -20,8 +19,8 @@ import { Logger } from "./utils/logger";
 /**
  * Creates and configures an MCP server for mermaid generation.
  */
-export function createServer(): Server {
-  const server = new Server(
+export function createServer(): McpServer {
+  const server = new McpServer(
     {
       name: "mcp-mermaid",
       version: "0.1.3",
@@ -35,20 +34,20 @@ export function createServer(): Server {
 
   setupToolHandlers(server);
 
-  server.onerror = (error) => Logger.error("MCP Error", error);
+  server.server.onerror = (error) => Logger.error("MCP Error", error);
 
   return server;
 }
 
 /**
  * Sets up tool handlers for the MCP server.
  */
-function setupToolHandlers(server: Server): void {
-  server.setRequestHandler(ListToolsRequestSchema, async () => ({
+function setupToolHandlers(server: McpServer): void {
+  server.server.setRequestHandler(ListToolsRequestSchema, async () => ({
     tools: [tool],
   }));
 
-  server.setRequestHandler(CallToolRequestSchema, async (request) => {
+  server.server.setRequestHandler(CallToolRequestSchema, async (request) => {
     if (request.params.name === tool.name) {
       try {
         const args = request.params.arguments || {};

src/services/sse.ts

@@ -1,10 +1,10 @@
-import type { Server } from "@modelcontextprotocol/sdk/server/index.js";
+import type { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
 import { SSEServerTransport } from "@modelcontextprotocol/sdk/server/sse.js";
 import type { Request, Response } from "express";
 import express from "express";
 
 export const startSSEMcpServer = async (
-  server: Server,
+  server: McpServer,
   endpoint = "/sse",
   port = 3033,
   host?: string,

src/services/stdio.ts

@@ -1,7 +1,7 @@
-import type { Server } from "@modelcontextprotocol/sdk/server/index.js";
+import type { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
 import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
 
-export async function startStdioMcpServer(server: Server): Promise<void> {
+export async function startStdioMcpServer(server: McpServer): Promise<void> {
   const transport = new StdioServerTransport();
   await server.connect(transport);
 }

src/services/streamable.ts

@@ -1,11 +1,11 @@
-import type { Server } from "@modelcontextprotocol/sdk/server/index.js";
+import type { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
 import { StreamableHTTPServerTransport } from "@modelcontextprotocol/sdk/server/streamableHttp.js";
 import cors from "cors";
 import type { Request, Response } from "express";
 import express from "express";
 
 export const startHTTPStreamableServer = async (
-  createServer: () => Server,
+  createServer: () => McpServer,
   endpoint = "/mcp",
   port = 1122,
   host?: string,