Single drop-in module for complete payments & subscription integration in SvelteKit
Add payments to your existing SvelteKit 5 app in 5 minutes. Includes type-safe checkout helpers, webhook signature verifier, and database subscription synchronizer.
Every module is structured for maintainability, type safety, and zero bloat.
Secure cryptographic signature checking to prevent spoofed webhook calls.
1-line helper function to redirect users directly to hosted checkouts.
Full TypeScript definitions for all webhook payload variations.
Clean, modular file organization designed to integrate into your existing project in minutes.
sveltekit-billing/
├── src/lib/server/billing.ts # Initialized billing client
├── src/routes/api/webhooks/ # SvelteKit +server.ts webhook route
└── src/lib/types/billing.ts # Typed webhook event schemasProduction-grade payment processing with cryptographic Svix webhook verification.
Pre-configured signature verification handler for order.created, customer.subscribed, and refund events.
Buyers can manage invoices, upgrade license seats, and access updated repositories anytime.
Instant automated repository invitation via Polar.sh with continuous git pull version updates.
Every starter kit and UI primitive adheres to strict engineering benchmarks.
End-to-End Strict TypeScript & Dart
Verified Webhook Security
Clean, Modular Architecture
Continuous Maintenance
Everything you need to know about licensing, setup, and support.
DevPreFlight provides production-grade starter kits and boilerplates categorized into 3 distinct tiers: Tier 1 (Micro Modules, $19-$29) for single-purpose utilities like webhook handlers or UI kits; Tier 2 (Core Feature Kits, $49-$69) for core auth, payment, and database setups; and Tier 3 (The All-in-One Mega Starter Kit, $99-$149) for complete full-stack SaaS boilerplates with lifetime updates and instant GitHub repository access.