Zero-configuration Express backends
By Steven Van ·
Vercel's framework-defined infrastructure now deploys Express apps directly, without vercel.json redirects or an /api folder.
Express applications can now deploy to Vercel with zero configuration. Vercel's framework-defined infrastructure recognises and understands Express apps directly, so there's no need for redirects in vercel.json or routing through an /api folder.
To deploy, an app needs a file that imports and exports the Express app (or uses a port listener) from one of several recognised locations, such as app.js or src/index.ts. Once deployed, the Express app runs as a single Vercel Function using Fluid compute by default, so it scales up and down with traffic. Full details are in the Express on Vercel documentation.
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