Vercel Log Monitoring with LogMonitor

>_ why vercel apps need log monitoring

Vercel's built-in log viewer shows limited history and requires you to be watching the dashboard at the exact moment an error occurs. Serverless function logs disappear quickly, and edge function logs are even harder to access. LogMonitor gives you persistent, real-time log streaming from every Vercel deployment so you never miss an error.

>_ how logmonitor works with vercel

Install the logmonitor-js SDK in your Vercel project and call logmonitor.init() in your application entry point. The SDK auto-patches console.log, console.info, console.warn, console.error, and console.debug from serverless functions, edge functions, and client-side code, then streams them to your LogMonitor Live Console. Logs are only sent in production (when process.env.NODE_ENV === 'production').

>_ quick start

import { logmonitor } from 'logmonitor-js';

logmonitor.init({ apiKey: 'your-api-key' });

export default async function handler(req, res) {

  console.log('Webhook received', { event: req.body.type, source: req.headers['x-source'] });

  try {

    await processWebhook(req.body);

    console.log('Webhook processed successfully');

    res.status(200).json({ ok: true });

  } catch (err) {

    console.error('Webhook processing failed', { error: err.message, body: req.body });

    res.status(500).json({ error: 'Processing failed' });

  }

}

>_ what you can monitor

• $Serverless function invocation errors
• $Edge function execution logs
• $API route response times and failures
• $Build and deployment event logs
• $Client-side JavaScript errors
• $Third-party webhook processing failures