一个全面的 ElysiaJS 插件用于实现 模型上下文协议（MCP）服务器 支持HTTP传输。

特色

• HTTP 传输：基于 HTTP 的完整 MCP 传输，支持可流式 HTTP
• 会话管理：通过头部进行有状态会话处理
• 类型安全：采用TypeScript和Zod验证构建
• 易于集成：Elysia应用的简单插件架构
• 全面支持：工具、资源、提示和日志
• 自定义记录器支持：使用任何记录器（pino、winston、bunyan等）
• 错误处理：正确的JSON-RPC 2.0错误响应
• 测试：使用Bun测试运行程序进行完整的单元测试覆盖

安装

入门模板

要快速开始预配置的Elysia MCP项目，您可以使用我们的入门模板：

elysia-mcp-starter模板包括：

• 预配置的 Elysia 搭配 MCP 插件
• TypeScript配置
• 开发脚本
• 基本项目结构
• 示例MCP服务器实现

快速启动

用途

例行列

基本示例：

多服务器示例：

这个示例演示了如何在单个 Elysia 应用中创建多个 MCP 插件：

Elysia MCP Plugin

A comprehensive ElysiaJS plugin for implementing Model Context Protocol (MCP) servers with HTTP transport support.

Features

• HTTP Transport: Full HTTP-based MCP transport with Streamable HTTP
• Session Management: Stateful session handling via headers
• Type-Safe: Built with TypeScript and Zod validation
• Easy Integration: Simple plugin architecture for Elysia apps
• Comprehensive Support: Tools, Resources, Prompts, and Logging
• Custom Logger Support: Use any logger (pino, winston, bunyan, etc.)
• Error Handling: Proper JSON-RPC 2.0 error responses
• Testing: Full unit test coverage with Bun test runner

Installation

bun add elysia-mcp
# or
npm install elysia-mcp

Starter Template

To quickly get started with a pre-configured Elysia MCP project, you can use our starter template:

# Create a new project from the starter template
bun create https://github.com/kerlos/elysia-mcp-starter my-mcp-project

# Navigate to the project
cd my-mcp-project

# Install dependencies
bun install

# Start development server
bun run dev

The elysia-mcp-starter template includes:

• Pre-configured Elysia setup with MCP plugin
• TypeScript configuration
• Development scripts
• Basic project structure
• Example MCP server implementation

Quick Start

import { Elysia } from 'elysia';
import { mcp } from 'elysia-mcp';
import { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js';
import { z } from 'zod';

const app = new Elysia()
  .use(
    mcp({
      serverInfo: {
        name: 'my-mcp-server',
        version: '1.0.0',
      },
      capabilities: {
        tools: {},
        resources: {},
        prompts: {},
        logging: {},
      },
      setupServer: async (server: McpServer) => {
        // Register your MCP tools, resources, and prompts here
        server.registerTool(
          'echo',
          {
            description: 'Echoes back the provided text',
            inputSchema: {
              text: z.string().describe('Text to echo back'),
            },
          },
          async (args) => {
            return {
              content: [{ type: 'text', text: `Echo: ${args.text}` }],
            };
          }
        );
      },
    })
  )
  .listen(3000);

Usage

Running the Examples

Basic Example:

# Run the basic example server (port 3000)
bun run example

# Or with development mode (auto-restart)
bun run dev

Multiple Servers Example:

# Run the multiple MCP servers example (port 3000)
bun example:multi

This example demonstrates how to create multiple MCP plugins in a single Elysia application:

• Math Operations Plugin (/math) - Basic arithmetic tools:

  • add - Add two numbers
  • multiply - Multiply two numbers
  • power - Calculate base to the power of exponent