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 or SSO login page - 401/403 errors when accessing the deployment - Preview URLs that require Vercel team membership Enabling Agent Access with Protect…