Vercel edge rescue

Vercel edge runtime breaks your AI-built app

Vercel edge runtime has limitations compared to Node.js. AI builders do not always produce edge-compatible code, and deploys fail with runtime errors.

What is probably broken

The app works locally with Node.js but Vercel edge runtime throws errors about missing modules or incompatible APIs.

What production should look like

The app running on a compatible runtime with no edge errors and working API routes.

STEP 01

Find the incompatible code

Edge runtime does not support all Node.js APIs.

  • Check Vercel logs for the specific module or API that failed.
  • Search for fs, path, crypto, or process usage in edge functions.
  • Identify which routes are configured to use edge runtime.

STEP 02

Fix the runtime configuration

Either fix the code or change the runtime setting.

  • Remove edge runtime config from routes that need Node.js APIs.
  • Replace incompatible APIs with edge-compatible alternatives.
  • Use polyfills only if the bundle size stays within limits.

STEP 03

Deploy and verify

Test the fix on Vercel or move to a VPS if edge is not the right fit.

  • Push the fix and trigger a new Vercel build.
  • Test every API route and server function on the new build.
  • If edge issues persist, move to a VPS with full Node.js support.

Quick check

Is your app production-ready?

If you cannot tick all five, we can fix it. Send us the repo and we handle the rest.

  • ?Custom domain with HTTPS
  • ?Environment variables configured
  • ?Database wired and backed up
  • ?Auto-deploy on push
  • ?Smoke tested and live

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