Skip to content

Vercel monitoring

You Deployed to Vercel. Did Anything Break?

Vercel makes deploying fast. But fast deploys mean fast breakage — a Next.js build that silently drops a page, an ISR route serving stale content, an Edge Function returning 200 with an error body. Sitewatch hooks into your Vercel pipeline and checks every asset on your site after every deploy.

  • Deploy hooks trigger checks after every Vercel deploy
  • Validates JS bundles, CSS, and Next.js assets
  • Auto-detects Next.js + Vercel stack for fix playbooks
Start monitoring See pricing

Vercel-specific failures

What breaks on Vercel that uptime tools miss

Build output mismatch

Critical

A Next.js build changes the chunk hash. The HTML references _next/static/chunks/main-a3f2c1.js but the CDN only has the new hash. The page loads, the app doesn't hydrate. Vercel says "deployed successfully."

ISR serving stale content

Critical

Incremental Static Regeneration should update pages in the background. But when revalidation fails silently, visitors get stale or broken content indefinitely. The origin is fine — the edge cache isn't.

Edge Function 200 with error body

Critical

A Vercel Edge Function hits a runtime error but catches it and returns 200 with an error message in the body. Uptime monitors see "200 OK." Users see "Something went wrong."

CDN stale immutable assets

Moderate

After a rollback or revert, Vercel's CDN may still serve cached immutable assets from the reverted deploy. The HTML expects old assets, the CDN serves new ones (or vice versa).

Preview deployment leak

Moderate

A preview deployment URL leaks into production through a hardcoded link, redirect, or API response. Traffic hits an unstable preview build instead of the production deployment.

Serverless cold start breakage

Low

A serverless function cold-starts and serves a response before all dependencies are initialized. The page loads with missing data or broken API responses.

11

Detection rules

5–30 min

Check intervals

23+

Stack playbooks

Built for Vercel workflows

How Sitewatch monitors your Vercel site

Vercel deploy hooks

Add a Sitewatch webhook to your Vercel project. Every deploy triggers an instant website check — no waiting for the next scheduled cycle.

Next.js stack detection

Sitewatch auto-detects Next.js and Vercel. Root cause diagnosis and fix playbooks are tailored to your exact stack — not generic troubleshooting.

Full asset validation

Every _next/static chunk, CSS module, image, and third-party script is validated. A single broken chunk gets caught immediately.

Multi-region checks

Vercel deploys to edge locations worldwide. Sitewatch checks from EU and US to catch regional CDN edge failures.

2-minute setup

Set up Vercel monitoring

01

Add your Vercel site

Enter your production URL. Sitewatch auto-discovers pages and assets. No code changes or build plugins needed.

02

Connect the deploy hook

Copy the Sitewatch webhook URL and add it to your Vercel project settings under "Deploy Hooks" or use the integration.

03

Deploy and verify

Push your next deploy. Sitewatch runs a full website check within minutes and alerts you if any asset is broken.

Start monitoring today

Free plan. No credit card.

Get started free

Vercel monitoring gap

Vercel Analytics vs Sitewatch

What it monitors

Vercel Analytics:Performance (Web Vitals)
Sitewatch:Page correctness (assets)

Broken JS detection

Vercel Analytics:No
Sitewatch:Yes

ISR staleness detection

Vercel Analytics:No
Sitewatch:Content fingerprinting

Post-deploy checks

Vercel Analytics:No
Sitewatch:Automatic via webhook

Root cause diagnosis

Vercel Analytics:No
Sitewatch:Next.js-specific playbooks

External alerting

Vercel Analytics:No
Sitewatch:Slack, Discord, email

Vercel monitoring FAQ

Deploy with confidence on Vercel

Free plan available. Set up in 2 minutes.

Monitor your Vercel site