Next.js OpenAPI Template
Looking for a Next.js OpenAPI template to build scalable SaaS applications? supastarter provides a production-ready starter kit with built-in OpenAPI specifications, type-safe API routes, and full documentation support for your SaaS backend.Next.js+OpenAPIGet supastarter for Next.jsRead API docs
Authentication
Let your users sign up and login with password, magic link or oAuth.
Payments
Charge your users with subscriptions. Choose your preferred payment provider.
Internationalization
Reach more customers by making your app multilingual.
Mails
Send transactional emails to your customers.
Style
Modern, beautiful UI. Fully customizable.
API
Reusable, extensible and type-safe REST-API for your SaaS.
Database
Access your data in a type-safe way with Prisma or Drizzle.
Organizations
Let your customers create organizations, add members and share resources.
AI
Add artificial intelligence to your app and give your customers superpowers.
SaaS Blog
Multi-language, MDX-based marketing blog to keep your customers up to date with the latest news.
SaaS Analytics
Track your users and their behavior for your SaaS and marketing pages.
SaaS Landing Page
A beautiful landing page with features, pricing and newsletter signup is included.
Learn moreSaaS Onboarding
Multi-step onboarding process to help your customers get started with your app.
Learn moreSaaS Documentation
Multi-language, MDX-based documentation to help your customers get started with your app.
Learn moreContact form
Let your customers contact you.
SaaS Legal Pages
Multi-language placeholder pages for privacy policy and terms of service are included.
Fully typed codebase
From backend to frontend, we are using TypeScript for full type safety.
Cursor / Windsurf support
Cursor / Windsurf rules are included for AI code generation.
One-time purchase. Unlimited projects.
supastarter is a one-time purchase with no recurring fees. You get access to the repository and can use it for as many projects as you want.
Lifetime access
for one developer
- All features includedAuthentication, billing, user management, and more. See list of features above.
- Lifetime updatesLast update to codebase: 1 day ago
- Saves you 120+ hours
- Exclusive discord server for support
📄 Why OpenAPI Matters
OpenAPI (formerly Swagger) provides a standardized way to describe RESTful APIs, making it easier for developers to consume, document, and maintain your SaaS backend. With OpenAPI, your API becomes self-documenting, discoverable, and type-safe.
✅ Benefits of a Next.js OpenAPI Template:
- Automatically generated API documentation — reduces manual docs
- Type-safe endpoints — integrate TypeScript for request/response safety
- Standardized API contracts — clear structure for frontend and third-party clients
- Easy API testing — compatible with tools like Swagger UI and Postman
- Scalable backend architecture — ready for SaaS and multi-tenant apps
🚀 What is supastarter?
supastarter is a production-ready SaaS boilerplate that provides OpenAPI support and backend scaffolding out of the box. You don’t need to manually define API specs or docs — supastarter handles it for you.
Whether you’re building subscription platforms, multi-tenant SaaS, or internal tools, supastarter gives you a reliable foundation for structured APIs.
🔧 Features of Next.js OpenAPI Template
- Preconfigured OpenAPI specs — for all API routes and endpoints
- Type-safe request/response validation — using TypeScript
- Auto-generated Swagger UI — interactive API documentation
- Webhook and subscription endpoints — ready for Stripe, Creem, Lemon Squeezy, or Polar
- Scalable multi-tenant support — handle multiple organizations or tenants
- API versioning support — manage breaking changes safely
💡 Who Is This For?
- Developers building structured SaaS APIs
- Teams needing OpenAPI documentation and type safety
- Founders launching products that require robust API contracts
- Anyone looking for a Next.js OpenAPI starter template
🧪 Built by Developers, for Developers
supastarter provides OpenAPI specifications, type-safe routes, and interactive docs out of the box.
With Next.js, you get a modern framework for backend and frontend integration. With supastarter, you get a complete OpenAPI SaaS foundation that saves time, improves developer experience, and ensures maintainable APIs.
See what supastarter customers are building
Discover the diverse range of projects and ideas that our 800+ customers have built with supastarter.
