Does MySQL Work With Vercel?
You can use MySQL with Vercel, but it requires external hosting since Vercel doesn't provide managed databases—you'll connect to a remote MySQL instance from serverless functions.
Quick Facts
How MySQL Works With Vercel
Vercel is a serverless platform optimized for frontend deployment, not database hosting. To use MySQL with Vercel, you must host your database separately (AWS RDS, PlanetScale, DigitalOcean, etc.) and connect to it from Vercel's serverless functions via API routes or edge functions. This architecture works well because Vercel functions can make outbound HTTP requests and database connections, but each function invocation is stateless and time-limited (10-60 seconds depending on plan). The developer experience involves creating API endpoints in Next.js or similar frameworks that handle database queries, then invoking these endpoints from your frontend. Connection pooling becomes critical since serverless functions create many short-lived connections; services like PlanetScale (MySQL-compatible) are popular because they include built-in connection pooling. You'll also need to manage environment variables for database credentials and handle cold starts gracefully.
Best Use Cases
Next.js API Route with MySQL Connection
npm install mysql2 dotenv// pages/api/users.ts
import { createConnection } from 'mysql2/promise';
import type { NextApiRequest, NextApiResponse } from 'next';
export default async function handler(
req: NextApiRequest,
res: NextApiResponse
) {
const connection = await createConnection({
host: process.env.DB_HOST,
user: process.env.DB_USER,
password: process.env.DB_PASSWORD,
database: process.env.DB_NAME,
});
try {
const [rows] = await connection.execute(
'SELECT id, name, email FROM users LIMIT 10'
);
res.status(200).json(rows);
} catch (error) {
res.status(500).json({ error: 'Database query failed' });
} finally {
await connection.end();
}
}Known Issues & Gotchas
Cold starts cause initial slow database queries, and MySQL connections are expensive in serverless
Fix: Use PlanetScale or similar managed MySQL with connection pooling, implement aggressive caching, and use Vercel's automatic function optimization
Database credentials in environment variables can leak if not properly secured
Fix: Always use Vercel's encrypted Environment Variables dashboard, never commit .env files, rotate credentials regularly
10-second timeout on free Vercel plan is too short for complex queries
Fix: Upgrade to Pro plan for 60-second timeout, optimize queries, or move heavy operations to background jobs
Geographic latency between Vercel edge functions and database in different region
Fix: Choose database location closest to your primary Vercel region, or use read replicas
Alternatives
- •PostgreSQL with Vercel + Prisma (similar setup, better TypeScript support)
- •MongoDB with Vercel + Mongoose (serverless-native NoSQL approach)
- •Supabase (PostgreSQL backend) with Vercel (fully integrated alternative)
Resources
Related Compatibility Guides
Explore more compatibility guides