import { Server } from '@modelcontextprotocol/sdk/server/index.js';
import { StdioServerTransport } from '@modelcontextprotocol/sdk/server/stdio.js';
import {
CallToolRequestSchema,
ListToolsRequestSchema,
CallToolResult,
Tool
} from '@modelcontextprotocol/sdk/types.js';
import { exampleTool } from './tools/example-tool.js';
export class DuplicateServerServer {
private server: Server;
constructor() {
this.server = new Server(
{
name: 'duplicate-server',
version: '1.0.0',
},
{
capabilities: {
tools: {},
},
}
);
this.setupHandlers();
this.setupErrorHandling();
}
private setupHandlers(): void {
// Tools handlers
this.server.setRequestHandler(ListToolsRequestSchema, async () => {
return {
tools: [
{
name: 'example_tool',
description: 'An example tool that demonstrates MCP server capabilities',
inputSchema: {
type: 'object',
properties: {
message: {
type: 'string',
description: 'Message to process',
},
},
required: ['message'],
},
},
] as Tool[],
};
});
this.server.setRequestHandler(CallToolRequestSchema, async (request): Promise<CallToolResult> => {
const { name, arguments: args } = request.params;
try {
switch (name) {
case 'example_tool':
return await exampleTool.execute(args);
default:
throw new Error(`Unknown tool: ${name}`);
}
} catch (error) {
const errorMessage = error instanceof Error ? error.message : 'Unknown error occurred';
return {
content: [
{
type: 'text',
text: `Error executing tool '${name}': ${errorMessage}`,
},
],
isError: true,
};
}
});
}
private setupErrorHandling(): void {
this.server.onerror = (error) => {
console.error('[duplicate-server] Error:', error);
};
process.on('SIGINT', async () => {
await this.server.close();
process.exit(0);
});
}
async start(): Promise<void> {
const transport = new StdioServerTransport();
await this.server.connect(transport);
console.error('[duplicate-server] Server started successfully');
}
}
