Relay — API Product SaaS Starter (Keys + Rate Limiting)

Relay — API Product SaaS Starter (Keys + Rate Limiting) is a no code app builder product available on the Whop marketplace, created by Toolstack and launched in September 2026.

Ship a production-ready API without building auth and billing from scratch. This Next.js 14 starter includes authenticated API key management with secure Stripe-style secret handling, a working URL-shortening endpoint, rate limiting by subscription plan, and integrated Stripe billing—all with zero third-party API costs. Everything runs locally with SQLite for instant setup. The included Prisma schema, NextAuth configuration, and Tailwind components give you a complete foundation. Modify the example endpoint or build your own; the architecture supports any API use case. What's included: - API key generation with one-time secret reveal (hashed storage, public lookup ID) - Rate limiting enforced by customer plan tier - Stripe billing integration and subscription management - URL-shortening endpoint as a working example - NextAuth.js for user authentication - Prisma ORM with SQLite for local development - Tailwind CSS components and responsive UI - Unlimited projects per customer - Complete source code and documentation

Relay — API Product SaaS Starter (Keys + Rate Limiting) has is priced at $79 (one-time payment).

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