@getalby/mcp/build/streamable_http.js

MCP server for controlling a Lightning wallet using Nostr Wallet Connect

import { createMCPServer } from "./mcp_server.js";
import { nwc } from "@getalby/sdk";
import { StreamableHTTPServerTransport } from "@modelcontextprotocol/sdk/server/streamableHttp.js";
import { getConnectionSecret } from "./auth.js";
import { json } from "express";
export function addStreamableHttpEndpoints(app) {
    app.post("/mcp", json(), async (req, res) => {
        // In stateless mode, create a new instance of transport and server for each request
        // to ensure complete isolation. A single instance would cause request ID collisions
        // when multiple clients connect concurrently.
        try {
            const nostrWalletConnectUrl = getConnectionSecret(req.header("Authorization"), req.query.nwc);
            if (!nostrWalletConnectUrl) {
                res
                    .status(400)
                    .send("Bearer auth with NWC connection secret or nwc query parameter not provided");
                return;
            }
            const client = new nwc.NWCClient({
                nostrWalletConnectUrl,
            });
            const server = createMCPServer(client);
            const transport = new StreamableHTTPServerTransport({
                sessionIdGenerator: undefined,
            });
            res.on("close", () => {
                console.log("Request closed");
                transport.close();
                server.close();
                client.close();
            });
            await server.connect(transport);
            await transport.handleRequest(req, res, req.body);
        }
        catch (error) {
            console.error("Error handling MCP request:", error);
            if (!res.headersSent) {
                res.status(500).json({
                    jsonrpc: "2.0",
                    error: {
                        code: -32603,
                        message: "Internal server error",
                    },
                    id: null,
                });
            }
        }
    });
}