# Paypal Integration

> Integrate PayPal payment processing with support for express checkout, subscriptions, and refund…

Integrate PayPal payment processing with support for express checkout, subscriptions, and refund management. Use when implementing PayPal payments, processing online transactions, or building e-commerce checkout flows.

- Page: https://ss33.ai/skills/dokhacgiakhoa/paypal-integration-63186572932
- Publisher: dokhacgiakhoa
- Category: [Finance & Markets](https://ss33.ai/skills/category/finance-and-markets-gri5ar) › [Payments & crypto](https://ss33.ai/skills/category/finance-and-markets-gri5ar/payments-and-crypto-jvjetm)
- License: MIT
- Source: https://github.com/dokhacgiakhoa/agent-skills-4-vibe-coding-cli/blob/c4a059bbf7a8d6b2162071f0fbfe74053faa6d20/.agent/skills/paypal-integration/SKILL.md

## Skill

SKILL.md: https://ss33.ai/api/v1/ss33/download/dokhacgiakhoa/paypal-integration-63186572932

# PayPal Integration

Master PayPal payment integration including Express Checkout, IPN handling, recurring billing, and refund workflows.

## Do not use this skill when

- The task is unrelated to paypal integration
- You need a different domain or tool outside this scope

## Instructions

- Clarify goals, constraints, and required inputs.
- Apply relevant best practices and validate outcomes.
- Provide actionable steps and verification.
- If detailed examples are required, open `resources/implementation-playbook.md`.

## Use this skill when

- Integrating PayPal as a payment option
- Implementing express checkout flows
- Setting up recurring billing with PayPal
- Processing refunds and payment disputes
- Handling PayPal webhooks (IPN)
- Supporting international payments
- Implementing PayPal subscriptions

## Core Concepts

## 🧠 Knowledge Modules (Fractal Skills)

### 1. [1. Payment Products](./sub-skills/1-payment-products.md)
### 2. [2. Integration Methods](./sub-skills/2-integration-methods.md)
### 3. [3. IPN (Instant Payment Notification)](./sub-skills/3-ipn-instant-payment-notification.md)
### 4. [Server-Side Order Creation](./sub-skills/server-side-order-creation.md)
### 5. [IPN Verification and Processing](./sub-skills/ipn-verification-and-processing.md)
### 6. [Create Subscription Plan](./sub-skills/create-subscription-plan.md)