openpencil/apps/web/server/api/mcp/server.post.ts

import { defineEventHandler, readBody, setResponseHeaders } from 'h3';
import { startMcpHttpServer, stopMcpHttpServer } from '../../utils/mcp-server-manager';

const MCP_DEFAULT_PORT = 3100;

interface PostBody {
  action: 'start' | 'stop';
  port?: number;
}

/** POST /api/mcp/server — Start or stop the standalone MCP HTTP server. */
export default defineEventHandler(async (event) => {
  setResponseHeaders(event, { 'Content-Type': 'application/json' });
  const body = await readBody<PostBody>(event);

  if (!body?.action || !['start', 'stop'].includes(body.action)) {
    return { error: 'Invalid action. Use "start" or "stop".' };
  }

  if (body.action === 'start') {
    const port = body.port ?? MCP_DEFAULT_PORT;
    return startMcpHttpServer(port);
  }

  return stopMcpHttpServer();
});