How I Built a SaaS in 7 Days With Next.js and Claude

## The Challenge Build a full SaaS platform in 7 days. No team. Just Claude, Next.js, and coffee. ## Day 1–2: Foundation Set up Next.js 16, Tailwind CSS v4, Clerk auth, Supabase DB. Built the auth flows, database schema, and middleware. ## Day 3–4: AI Tools Built all 10 AI tools using the Anthropic Claude API. Each tool has its own route, UI, and credit system. ## Day 5: Stripe Wired up Stripe checkout, webhooks, and the billing portal. Free → Pro → Agency tiers. ## Day 6: Admin CRM Built the full admin panel — users, leads, blog, projects, services, site settings. ## Day 7: Deploy Pushed to GitHub, connected to Vercel, added environment variables. Live in minutes. ## Key Lessons - Next.js App Router is the right choice for SaaS - Clerk is worth every cent for auth - Claude writes better code than ChatGPT for complex tasks - Ship fast, iterate faster