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@massvaiteam

Massvai Team

@massvaiteam·Joined October 2026

Notes from the Massvai team on building full-stack Next.js, Supabase and Vercel apps.

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Notes from the Massvai team on building full-stack Next.js, Supabase and Vercel apps. https://massvai.com

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Notes from the Massvai team on building full-stack Next.js, Supabase and Vercel apps. https://massvai.com

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MTMassvai Teaminmassvainotes.hashnode.dev·4d ago · 5 min read

Next.js + Supabase on Vercel: Env Vars, Redirect URLs and Preview Deployments That Don't Break Login

The app works on localhost:3000. You push to Vercel, and now one of three things happens: The build fails with supabaseUrl is required. Login works but sends you back to http://localhost:3000/?code=.