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Vercel Deployment Guide

Deployment Protection and Agent Access

Vercel deployments may have Deployment Protection enabled, which requires authentication to access preview deployments. This can block automated testing and agent access to preview URLs.

Identifying Protected Deployments

If you encounter a login page or authentication requirement when accessing a Vercel preview URL, the deployment has protection enabled. Signs include:

  • Redirect to vercel.com/login or SSO login page
  • 401/403 errors when accessing the deployment
  • Preview URLs that require Vercel team membership

Enabling Agent Access with Protection Bypass

To allow agents and automated systems to access protected deployments, users need to set up Protection Bypass for Automation:

  1. Navigate to Project Settings
    • Go to the Vercel Dashboard
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