#!/usr/bin/env node
import { Server } from "@modelcontextprotocol/sdk/server/index.js";
import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
import {
CallToolRequestSchema,
ListToolsRequestSchema,
Tool,
} from "@modelcontextprotocol/sdk/types.js";
import dotenv from "dotenv";
import { fetchTopHeadlines, getNewsDetails } from "./tools/fetchNews.js";
import { summarizeNews } from "./tools/summarize.js";
import { translateToKorean } from "./tools/translate.js";
// Load environment variables
dotenv.config();
// Validate required environment variables
if (!process.env.NEWS_API_KEY) {
throw new Error("NEWS_API_KEY is required in .env file");
}
if (!process.env.OPENAI_API_KEY) {
throw new Error("OPENAI_API_KEY is required in .env file");
}
// Create MCP server instance
const server = new Server(
{
name: "mcp-news-server",
version: "1.0.0",
},
{
capabilities: {
tools: {},
},
},
);
// Define available tools
const tools: Tool[] = [
{
name: "get_top_headlines",
description:
"Fetch the top 10 US news headlines from today. Returns headline, source, and publication time.",
inputSchema: {
type: "object",
properties: {
category: {
type: "string",
description:
"News category (optional): business, entertainment, general, health, science, sports, technology",
enum: [
"business",
"entertainment",
"general",
"health",
"science",
"sports",
"technology",
],
},
},
},
},
{
name: "get_news_details",
description:
"Get detailed information about a specific news article including full description and URL.",
inputSchema: {
type: "object",
properties: {
title: {
type: "string",
description: "The exact title of the news article",
},
},
required: ["title"],
},
},
{
name: "summarize_news",
description:
"Summarize a news article using AI. Provides a concise summary of the content.",
inputSchema: {
type: "object",
properties: {
text: {
type: "string",
description: "The news text to summarize",
},
maxLength: {
type: "number",
description:
"Maximum length of summary in words (default: 100)",
},
},
required: ["text"],
},
},
{
name: "translate_to_korean",
description:
"Translate English news text to Korean with high quality translation.",
inputSchema: {
type: "object",
properties: {
text: {
type: "string",
description: "The English text to translate",
},
},
required: ["text"],
},
},
];
// Handle tool listing
server.setRequestHandler(ListToolsRequestSchema, async () => {
return { tools };
});
// Handle tool calls
server.setRequestHandler(CallToolRequestSchema, async (request) => {
const { name, arguments: args } = request.params;
try {
switch (name) {
case "get_top_headlines": {
const category = args?.category as string | undefined;
const headlines = await fetchTopHeadlines(category);
return {
content: [
{
type: "text",
text: JSON.stringify(headlines, null, 2),
},
],
};
}
case "get_news_details": {
const title = args?.title as string;
if (!title) {
throw new Error("Title is required");
}
const details = await getNewsDetails(title);
return {
content: [
{
type: "text",
text: JSON.stringify(details, null, 2),
},
],
};
}
case "summarize_news": {
const text = args?.text as string;
const maxLength = (args?.maxLength as number) || 100;
if (!text) {
throw new Error("Text is required");
}
const summary = await summarizeNews(text, maxLength);
return {
content: [
{
type: "text",
text: summary,
},
],
};
}
case "translate_to_korean": {
const text = args?.text as string;
if (!text) {
throw new Error("Text is required");
}
const translation = await translateToKorean(text);
return {
content: [
{
type: "text",
text: translation,
},
],
};
}
default:
throw new Error(`Unknown tool: ${name}`);
}
} catch (error) {
const errorMessage =
error instanceof Error ? error.message : String(error);
return {
content: [
{
type: "text",
text: `Error: ${errorMessage}`,
},
],
isError: true,
};
}
});
// Start the server
async function main() {
const transport = new StdioServerTransport();
await server.connect(transport);
console.error("MCP News Server running on stdio");
}
main().catch((error) => {
console.error("Fatal error:", error);
process.exit(1);
});
