Build an AI PDF SaaS with Cursor, Next.js, Supabase and PayPal
Practical build guide for shipping an AI PDF product from MVP scope to launch checklist.
Secondary AI Coding Resources
Use Cursor Rules and MCP Setups as supporting implementation resources while you work through this tech stack or playbook.
Related Ideas
AI PDF SaaS Idea
Build a PDF summarizer, translator, and Q&A SaaS with Cursor, Next.js, Supabase, and PayPal.
AI Customer Support Chatbot Idea
Build a small support chatbot product for docs, FAQs, onboarding, and lead capture.
AI Resume Builder Idea
Build an AI-assisted resume builder for job seekers who want faster resume drafting and editing.
Related Open Source References
Related Cursor Rules
Best Cursor Rules for AI PDF Apps
Rules for building PDF upload + parsing apps without unsafe file handling.
Best Cursor Rules for PayPal Subscription Apps
Rules to implement PayPal subscriptions without breaking webhooks or env safety.
Best Cursor Rules for Next.js SaaS
A copy-paste .cursorrules template to keep Cursor focused while building Next.js SaaS apps.
Related Fixes
PayPal Webhook Not Receiving Events — Fix Guide
Debug sandbox configuration, local tunnels, event subscriptions, and signature verification issues.
PDF Upload Fails in Next.js — Common Fixes
Debug file size limits, MIME validation, server actions, and storage integration for PDF uploads.
Supabase Auth Redirect Not Working — Fix Guide
Fix callback URLs, cookies, site URL mismatches, and redirect handling in Next.js auth flows.
Overview
A step-by-step workflow you can follow inside Cursor to ship a real feature with minimal thrash.
Tech stack
- Next.js
- TypeScript
- Your data layer (Supabase/Postgres/etc)
Project structure
- src/app
- src/components
- src/lib
- content/workflows
Step-by-step workflow
- Define acceptance criteria
- Ask Cursor to propose a minimal plan
- Implement in small patches
- Run lint/build
- Deploy and verify
Cursor prompts
Read the relevant files and propose a minimal plan. Do not change unrelated files.
Then implement the plan with small diffs and list verification steps.
Deployment checklist
- Environment variables set
- Build passes locally
- Basic smoke test in preview
Common issues
- Missing env vars
- Mixed server/client boundaries
Related tools
- Cursor
- Claude Code
FAQ
Should I follow every step exactly?
Use the guide as a shipping checklist, but cut steps that do not match your stack or MVP scope.
When should I add tests?
Add focused tests around risky logic, data transforms, auth, billing, or anything likely to regress.
What should I do if the guide feels too broad?
Break it into one acceptance criterion at a time and ask your AI editor to implement in small reviewable diffs.