How to Monitor Next.js API Routes in Production (Step-by-Step)

Your Next.js app is in production. Users are hitting your API routes. But how do you know if /api/users is responding in 200ms or 2000ms? How do you know if your payment webhook is returning 500 errors at 3 AM?

Most developers deploy and hope for the best. In this guide, you'll learn how to set up proper API monitoring for your Next.js routes — with automated health checks, latency tracking, and instant alerts — in under 5 minutes.

Why Monitor Next.js API Routes?

Next.js API routes are serverless functions under the hood (on Vercel) or Express-like handlers (on Node). Either way, they can fail silently:

• Cold starts can spike latency from 50ms to 2000ms+
• Database connections can time out without visible errors
• Third-party APIs (Stripe, Auth0, etc.) can degrade and cascade failures
• SSL certificates can expire and break all HTTPS traffic
• DNS changes can propagate incorrectly across regions

Without monitoring, you only find out when users complain — or when revenue drops.

What to Monitor

For each API route, you should track:

Step 1: Install the Monitoring SDK

Add the Nurbak Watch SDK to your Next.js project:

npm install @nurbak/watch

This is a lightweight package (< 10KB) with zero dependencies. It won't affect your bundle size or cold start time.

Step 2: Add the Instrumentation File

Create instrumentation.ts in your project root (Next.js 13.4+ supports this natively):

import { initWatch } from '@nurbak/watch'

export function register() {
  initWatch({
    apiKey: process.env.NURBAK_WATCH_KEY,
  })
}

That's 5 lines of code. No YAML files, no agent configuration, no dashboard setup. The SDK automatically discovers your API routes and starts reporting health data.

Step 3: Configure Alerts

In the Nurbak dashboard, configure when you want to be notified:

• API Down — endpoint returns errors or is unreachable
• High Latency — response time exceeds your threshold (e.g., > 2000ms)
• Error Rate — 4xx/5xx percentage exceeds threshold (e.g., > 10%)
• SSL Expiry — certificate expires within N days (e.g., < 14 days)

Alerts can be sent to:

• Slack — via webhook (Block Kit formatted messages)
• Email — instant delivery via Resend
• WhatsApp — direct message to your phone
• SMS — for critical alerts when you're away from your desk

Step 4: Deploy and Verify

Deploy your app normally. Within 5 minutes, the first health check will run. You'll see your endpoints appear in the dashboard with real-time metrics:

• Response time trends (30-day chart with P95)
• Uptime percentage per endpoint
• Active incidents and their duration
• SSL certificate status and expiry date

Multi-Region Monitoring

One of the biggest advantages of dedicated monitoring is checking from multiple locations. Nurbak runs health checks from 4 regions:

• Virginia, US — North America
• São Paulo, Brazil — South America
• Paris, France — Europe
• Tokyo, Japan — Asia Pacific

This means you can detect regional outages — like when your Vercel deployment is healthy in the US but timing out from Europe due to a CDN issue.

What About Vercel Analytics?

Vercel provides basic analytics and logging, but it's not a monitoring solution:

• No automated health checks from external regions
• No proactive alerts (you have to check the dashboard manually)
• No P95/P99 latency percentiles per endpoint
• No SSL certificate monitoring
• No incident tracking with duration

Vercel Analytics tells you what happened. Monitoring tells you the moment it happens — and wakes you up if needed.

Free Tier

Nurbak's free plan includes everything you need to get started:

• 1 project, 3 endpoints
• Health checks every 5 minutes from 1 region
• Email alerts for downtime
• 30-day uptime history
• No credit card required

For teams that need faster checks (every minute), multi-region monitoring, and Slack/WhatsApp alerts, the Pro plan is $29/month.

Summary

Monitoring your Next.js API routes takes 5 minutes and 5 lines of code. You get automated health checks from 4 global regions, P95 latency tracking, and instant alerts on Slack/email/WhatsApp. Don't wait for users to report outages — know first.