Vercel Integration Guide

Drop-in JA4+ fingerprinting for your Vercel applications

This guide shows you how to integrate JA4+ threat intelligence into your own Vercel projects using FoxIO Atlas as your backend.

1. Enable Vercel Firewall

JA4 fingerprints are available through Vercel Firewall

Enable Vercel Firewall for your project:

# In your Vercel dashboard:

1. Go to Project Settings → Security

2. Enable "Vercel Firewall"

3. JA4 headers will be automatically added to requests

2. Set Environment Variables

Configure FoxIO Atlas connection

JA4DB_INGEST_URL=https://ja4-atlas.platphormnews.com

JA4DB_INGEST_TOKEN=your-secure-token-here

JA4DB_SENSOR_NAME=my-app-production

JA4DB_SAMPLE_RATE=1.0 # 1.0 = 100%

JA4DB_ENV=production

Contact the FoxIO Atlas team to get your ingestion token.

3. Install Dependencies

No additional packages needed - uses native fetch

The integration uses standard Next.js middleware and built-in fetch API. No additional dependencies required.

Need Help?

For questions or custom integration support: