#Next.js & Vercel

There is no dedicated Next.js adapter — bull-board runs inside a Next.js API route using an existing adapter. Two runnable examples:

• examples/with-nextjs-app — App Router, @bull-board/hono adapter.
• examples/with-nextjs-pages — Pages Router, @bull-board/express adapter.

Both deploy to Vercel. The mounting differs by router; the Vercel-specific config is identical and is the part most people miss.

#App Router (Hono)

A single optional catch-all Route Handler at app/api/queues/[[...path]]/route.ts:

import { createBullBoard } from '@bull-board/api';
import { BullMQAdapter } from '@bull-board/api/bullMQAdapter';
import { HonoAdapter } from '@bull-board/hono';
import { serveStatic } from '@hono/node-server/serve-static';
import { Hono } from 'hono';
import { handle } from 'hono/vercel';
import { queue } from '@/lib/queue';

export const runtime = 'nodejs';
export const dynamic = 'force-dynamic';

const basePath = '/api/queues';
const serverAdapter = new HonoAdapter(serveStatic);
serverAdapter.setBasePath(basePath);

createBullBoard({ queues: [new BullMQAdapter(queue)], serverAdapter });

const app = new Hono();
app.route(basePath, serverAdapter.registerPlugin());

export const GET = handle(app);
export const POST = handle(app);
export const PUT = handle(app);
export const PATCH = handle(app);
export const DELETE = handle(app);

#Pages Router (Express)

A single optional catch-all API route at pages/api/queues/[[...path]].ts that delegates to an Express router. Disable bodyParser and enable externalResolver so Express owns the response:

import { createBullBoard } from '@bull-board/api';
import { BullMQAdapter } from '@bull-board/api/bullMQAdapter';
import { ExpressAdapter } from '@bull-board/express';
import express from 'express';
import { queue } from '../../../lib/queue';

const basePath = '/api/queues';
const serverAdapter = new ExpressAdapter();
serverAdapter.setBasePath(basePath);

createBullBoard({ queues: [new BullMQAdapter(queue)], serverAdapter });

const app = express();
app.use(basePath, serverAdapter.getRouter());

export const config = { api: { bodyParser: false, externalResolver: true } };

export default function handler(req, res) {
  return app(req, res);
}

#The Vercel fix (both routers)

@bull-board/api finds the UI's compiled assets with eval(require.resolve('@bull-board/ui/package.json')). The eval deliberately hides the require from bundlers — and that includes Next.js's static file tracer (@vercel/nft). On Vercel the UI files are never copied into the function, so you get:

Error: Cannot find module '@bull-board/ui/package.json'

Fix it in next.config.js:

/** @type {import('next').NextConfig} */
module.exports = {
  // Resolve bull-board and bullmq from node_modules at runtime, not from the bundle.
  serverExternalPackages: ['@bull-board/api', '@bull-board/ui', 'bullmq'],

  // Force the compiled UI into the serverless function (the tracer can't see the eval).
  outputFileTracingIncludes: {
    '/api/queues/*': ['./node_modules/@bull-board/ui/dist/**/*'],
  },
};

serverExternalPackages and outputFileTracingIncludes are stable top-level options in Next.js 15+ (in 13/14 they lived under experimental).

#Alternative: uiBasePath

Instead of the trace config you can tell bull-board where the UI lives directly, skipping the eval(require.resolve(...)) entirely:

createBullBoard({
  queues,
  serverAdapter,
  options: { uiBasePath: 'node_modules/@bull-board/ui' },
});

You still need outputFileTracingIncludes so the files are actually deployed — this only changes how the path is resolved, not whether the files are present.

#Workers

BullMQ workers are long-running and cannot run inside serverless functions. Next.js (the dashboard and any job-producing routes) deploys to Vercel; the worker runs as a separate always-on process — a container, a VM, or a dedicated worker service. Both examples ship a standalone worker.ts for local processing.