payment-gateway-integration

Integrates payment processing with Stripe, PayPal, or Square including subscriptions, webhooks, and PCI compliance. Use when implementing checkout flows, recurring billing, or handling refunds and disputes.

1.25x

Quality

93%

Does it follow best practices?

Impact

100%

1.25x

Average score across 3 eval scenarios

Securityby

Advisory

Suggest reviewing before use

Evaluation results

100%

22%

Online Storefront Stripe Integration

Stripe checkout and webhook handling

Criteria

Without context

With context

Cents conversion

100%

automatic_payment_methods

100%

Raw body middleware

100%

Signature verification

100%

Signature error handling

100%

payment_intent.succeeded handler

100%

invoice.payment_failed handler

100%

Webhook acknowledgment format

100%

No hardcoded keys

100%

Official SDK used

100%

26%

PayPal Checkout Backend for a Digital Marketplace

PayPal order creation and capture

Criteria

Without context

With context

Official PayPal SDK

100%

Environment switching

100%

CAPTURE intent

100%

return=representation preference

100%

Amount as decimal string

100%

application_context URLs

100%

application_context settings

100%

Capture status check

100%

Refund uses captureId

100%

PayPal webhook events

100%

No hardcoded credentials

100%

12%

SaaS Subscription Billing with Stripe

Stripe subscriptions and security practices

Criteria

Without context

With context

payment_behavior param

100%

Expand latest invoice

100%

Idempotency keys

100%

Refund cents conversion

100%

No hardcoded API key

75%

100%

Transaction ID logging

100%

Card data not logged

100%

Minimal data storage

100%

Official SDK

100%

Retry safety documented

100%

Repository: secondsky/claude-skills
Commit: 90d6bd7

Evaluated: 29 days ago
Agent: Claude Code
Model: Claude Sonnet 4.6

Table of Contents

Online Storefront Stripe Integration PayPal Checkout Backend for a Digital Marketplace SaaS Subscription Billing with Stripe

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