Is the system secure for handling sensitive payment data?

Yes, it implements industry standards including AES-256 encryption for billing keys, webhook signature validation to prevent spoofing, and idempotency keys to prevent duplicate transactions.

How does it handle subscription changes like upgrades or downgrades?

It implements a built-in proration (pro-rata) calculation utility that automatically adjusts billing amounts based on the remaining time in the current cycle.

Can this skill adapt to different backend frameworks?

Absolutely. While it uses a reference architecture (Next.js/PostgreSQL), it contains a tech stack adaptation matrix to generate code for Spring Boot, NestJS, FastAPI, and various ORMs like JPA or Prisma.

Does it include automated payment retries?

Yes, it includes a dedicated Dunning Manager that follows a 4-stage retry strategy for failed payments, complete with status tracking and notification hooks.

What payment gateways are supported out of the box?

The skill includes pre-configured adapters for Toss Payments and KCP, but utilizes a PG-agnostic abstraction layer that allows for easy integration with Stripe, PayPal, or other providers.

Subscription Payment Engine

Name: Subscription Payment Engine
Author: ASTRA-TECHNOLOGY-COMPANY-LIMITED

byASTRA-TECHNOLOGY-COMPANY-LIMITED

0•

Eコマースソリューション

Automates the end-to-end implementation of secure subscription payment systems, from database schema design to PG integration and frontend management interfaces.

The Subscription Payment Engine is a comprehensive skill designed to eliminate the complexity of building robust billing infrastructures. It follows a structured methodology to automatically generate technical blueprints, database schemas (13+ tables), and API endpoints while adapting to your project's specific tech stack. By handling intricate logic such as proration, dunning strategies, and secure billing key encryption, this skill enables developers to deploy production-ready SaaS billing systems—including PG integration with providers like Toss Payments—in a fraction of the usual time.

主な機能

01Complete frontend UI suite for pricing, payment methods, and admin dashboards

020 GitHub stars

03PG-agnostic abstraction layer with built-in adapters for Toss Payments and KCP

04Secure AES-256 encryption for billing keys and HMAC webhook verification

05Automated 13-table database schema generation for plans, subscriptions, and credits

06Full subscription lifecycle management including proration and 4-stage dunning

ユースケース

01Rapidly launching a SaaS subscription billing system from scratch

02Implementing usage-based credit systems with automated recurring billing

03Standardizing payment logic across multiple microservices using a reference architecture

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add astra-technology-company-limited/astra-methodology payment-module

For use in Claude.ai and ChatGPT

主な機能

01Complete frontend UI suite for pricing, payment methods, and admin dashboards

020 GitHub stars

03PG-agnostic abstraction layer with built-in adapters for Toss Payments and KCP

04Secure AES-256 encryption for billing keys and HMAC webhook verification

05Automated 13-table database schema generation for plans, subscriptions, and credits

06Full subscription lifecycle management including proration and 4-stage dunning

ユースケース

01Rapidly launching a SaaS subscription billing system from scratch

02Implementing usage-based credit systems with automated recurring billing

03Standardizing payment logic across multiple microservices using a reference architecture

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add astra-technology-company-limited/astra-methodology payment-module

For use in Claude.ai and ChatGPT