yaak/plugins-external/mcp-server/src/index.ts

import type { Context, PluginDefinition } from '@yaakapp/api';
import { createMcpServer } from './server.js';

const serverPort = parseInt(process.env.YAAK_PLUGIN_MCP_SERVER_PORT ?? '64343', 10);

let mcpServer: Awaited<ReturnType<typeof createMcpServer>> | null = null;

export const plugin: PluginDefinition = {
  async init(ctx: Context) {
    // Start the server after waiting, so there's an active window open to do things
    // like show the startup toast.
    console.log('Initializing MCP Server plugin');
    setTimeout(async () => {
      try {
        mcpServer = createMcpServer({ yaak: ctx }, serverPort);
      } catch (err) {
        console.error('Failed to start MCP server:', err);
        ctx.toast.show({
          message: `Failed to start MCP Server: ${err instanceof Error ? err.message : String(err)}`,
          icon: 'alert_triangle',
          color: 'danger',
          timeout: 10000,
        });
      }
    }, 5000);
  },

  async dispose() {
    console.log('Disposing MCP Server plugin');

    if (mcpServer) {
      await mcpServer.close();
      mcpServer = null;
    }
  },
};