Skill UI

A comprehensive guide to integrating PayPal into applications, covering all aspects of the payment lifecycle. This skill covers client-side implementations using JavaScript SDK for Express Checkout, server-side API interactions (REST API) for order creation and capture, handling recurring billing via Subscriptions, managing asynchronous updates through IPN/Webhooks, and processing refunds and payouts. Ideal for building robust e-commerce payment gateways.

Automate Stripe payment, customer, invoice, subscription, and refund workflows through Composio's Stripe toolkit via Rube MCP, keeping schema discovery up to date by searching tools before issuing commands.

Master Stripe payment processing integration for robust, PCI-compliant payment flows. This skill covers all aspects of modern billing, including one-time charges, recurring subscriptions, handling webhooks, and processing refunds. Ideal for building secure, scalable e-commerce and SaaS billing systems in web or mobile applications.

A comprehensive preflight checklist for submitting manuscripts to the Journal of Corporate Finance (JCF) via Editorial Manager. This guide verifies critical elements such as the non-refundable submission fee ($340), adherence to formatting rules (e.g., ≤250-word abstract, author-date citations), and inclusion of mandatory declarations (e.g., CoI, generative-AI disclosure, Option C data statement). Use this before finalizing your submission to ensure compliance and minimize desk rejection risks.

This skill covers comprehensive PayPal payment integration, including Express Checkout, Instant Payment Notification (IPN) handling, recurring billing setups, and refund workflows. It guides developers on implementing both client-side JavaScript SDKs and server-side REST APIs for secure transaction processing. Learn to manage subscriptions, payouts, and webhook verifications effectively.

Implement and verify Stripe checkout, subscriptions, webhooks, and refunds with explicit server-side authorization. Covers payment flows, webhook handling, subscription management, and customer management. Provides code patterns for hosted checkout, payment intents, and setup intents. Emphasizes security boundaries and proper use of test accounts.