@rockship/apollo-io-mcp/dist/sse/index.js

A powerful Model Context Protocol (MCP) server implementation for seamless Apollo.io API integration, enabling AI assistants to interact with Apollo.io data

import { SSEServerTransport } from "@modelcontextprotocol/sdk/server/sse.js";
import express from "express";
import { createMcpServer } from "../common/mcp-server.js";
import { getServerConfig, setupExpressApp, setupGracefulShutdown, setupHealthCheck, setupListenServer, } from "../common/server-utils.js";
let server;
function createSSEServer() {
    const app = express();
    const transports = {};
    setupExpressApp(app);
    setupHealthCheck(app, transports);
    // Legacy SSE endpoint for older clients
    app.get("/sse", async (req, res) => {
        // Create SSE transport for legacy clients
        const transport = new SSEServerTransport("/messages", res);
        transports[transport.sessionId] = transport;
        const apiKey = req.query.apiKey || process.env.APOLLO_IO_API_KEY;
        if (!apiKey) {
            res.status(400).json({ error: "API key is required" });
            return;
        }
        if (!server) {
            server = createMcpServer(apiKey);
        }
        res.on("close", () => {
            delete transports[transport.sessionId];
            console.log(`SSE connection closed for sessionId: ${transport.sessionId}`);
        });
        // Connect to the MCP server
        await server.connect(transport);
        console.log(`SSE connection established with sessionId: ${transport.sessionId}`);
    });
    // Legacy message endpoint for older clients
    app.post("/messages", async (req, res) => {
        const sessionId = req.query.sessionId;
        const transport = transports[sessionId];
        if (transport) {
            await transport.handlePostMessage(req, res, req.body);
        }
        else {
            res.status(400).send("No transport found for sessionId");
        }
    });
    return app;
}
/**
 * Start the SSE server with proper error handling and graceful shutdown
 */
async function startServer() {
    try {
        const config = getServerConfig("HTTP_PORT", "8080");
        const sseServer = createSSEServer();
        const server = setupListenServer(sseServer, "SSE", config);
        setupGracefulShutdown(server, "SSE");
    }
    catch (error) {
        console.error("❌ Failed to start server:", error);
        process.exit(1);
    }
}
startServer().catch((error) => {
    console.error("❌ Server startup failed:", error);
    process.exit(1);
});
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