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

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Merged
hustcc merged 1 commit into from
Mar 27, 2026
Merged

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

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4 changes: 2 additions & 2 deletions package.json
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Original file line number Diff line number Diff line change
Expand Up @@ -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",
Expand All @@ -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",
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15 changes: 7 additions & 8 deletions src/server.ts
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Original file line number Diff line number Diff line change
@@ -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,
Expand All @@ -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",
Expand All @@ -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) => {
Comment on lines +45 to +50

Copilot AI Mar 25, 2026

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The migration to McpServer changes how request handlers and error handling are wired up (via server.server.*), but there are no automated tests covering server creation/handler registration. Adding a small unit test that instantiates createServer() and asserts ListTools/CallTool handlers are registered (and callable) would help catch SDK API regressions in future upgrades.

Copilot uses AI. Check for mistakes.
if (request.params.name === tool.name) {
try {
const args = request.params.arguments || {};
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4 changes: 2 additions & 2 deletions src/services/sse.ts
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@@ -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,
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4 changes: 2 additions & 2 deletions src/services/stdio.ts
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Original file line number Diff line number Diff line change
@@ -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);
}
4 changes: 2 additions & 2 deletions src/services/streamable.ts
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@@ -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,
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