#!/usr/bin/env node
import { Server } from "@modelcontextprotocol/sdk/server/index.js";
import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
import {
ListToolsRequestSchema,
CallToolRequestSchema,
} from "@modelcontextprotocol/sdk/types.js";
const server = new Server(
{
name: "minimal-mcp-server",
version: "1.0.0",
},
{
capabilities: {
tools: {},
},
}
);
const tools = [
{
name: "calculate_sum",
description: "Calculate the sum of two numbers",
inputSchema: {
type: "object",
properties: {
a: { type: "number", description: "First number" },
b: { type: "number", description: "Second number" },
},
required: ["a", "b"],
},
},
{
name: "reverse_string",
description: "Reverse a string",
inputSchema: {
type: "object",
properties: {
text: { type: "string", description: "Text to reverse" },
},
required: ["text"],
},
},
{
name: "get_current_time",
description: "Get the current time",
inputSchema: {
type: "object",
properties: {},
required: [],
},
},
];
server.setRequestHandler(ListToolsRequestSchema, async () => {
return { tools };
});
server.setRequestHandler(CallToolRequestSchema, async (request) => {
const { name, arguments: args } = request.params;
switch (name) {
case "calculate_sum":
const { a, b } = args as { a: number; b: number };
const result = a + b;
return {
content: [
{
type: "text",
text: `The sum of ${a} and ${b} is ${result}`,
},
],
};
case "reverse_string":
const { text } = args as { text: string };
const reversed = text.split("").reverse().join("");
return {
content: [
{
type: "text",
text: `Reversed text: ${reversed}`,
},
],
};
case "get_current_time":
const now = new Date();
return {
content: [
{
type: "text",
text: `Current time: ${now.toISOString()}`,
},
],
};
default:
throw new Error(`Unknown tool: ${name}`);
}
});
async function main() {
const transport = new StdioServerTransport();
await server.connect(transport);
console.error("Minimal MCP Server started successfully");
}
main().catch((error) => {
console.error("Server error:", error);
process.exit(1);
});
