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Complete guide for integrating Stripe payments (subscriptions or one-time) with Convex + Next.js. Includes user interviews, API setup, webhook configuration, testing phases, and production deployment. Use this skill when Adding payment functionality to a Convex + Next.js app

Use SAP-RPT-1-OSS open source tabular foundation model for predictive analytics on SAP business data. Handles classification and regression tasks including customer churn prediction, delivery delay forecasting, payment default risk, demand planning, and financial anomaly detection. Use when asked to predict, forecast, classify, or analyze patterns in SAP tabular data exports (CSV/DataFrame). Runs locally via Hugging Face model.

Implement payment integrations with SePay (Vietnamese payment gateway with VietQR, bank transfers, cards) and Polar (global SaaS monetization platform with subscriptions, usage-based billing, automated benefits). Use when integrating payment processing, implementing checkout flows, managing subscriptions, handling webhooks, processing bank transfers, generating QR codes, automating benefit delivery, or building billing systems. Supports authentication (API keys, OAuth2), product management, customer portals, tax compliance (Polar as MoR), and comprehensive SDK integrations (Node.js, PHP, Python, Go, Laravel, Next.js). | Sử dụng khi: thanh toán, Stripe, PayPal, checkout, đăng ký, subscription.

Comprehensive Flow Nexus platform management - authentication, sandboxes, app deployment, payments, and challenges

Expert knowledge on Stripe integration, subscription plans (Glow Up, Viral Surge, Fame Flex), trial logic, plan enforcement, webhooks, and billing synchronization. Use this skill when user asks about "subscription", "billing", "stripe", "payment", "plan limits", "trial", "upgrade", "downgrade", "webhook", or "plan enforcement".

Use SAP-RPT-1-OSS open source tabular foundation model for predictive analytics on SAP business data. Handles classification and regression tasks including customer churn prediction, delivery delay forecasting, payment default risk, demand planning, and financial anomaly detection. Use when asked to predict, forecast, classify, or analyze patterns in SAP tabular data exports (CSV/DataFrame). Runs locally via Hugging Face model.

Implement secure payments using Clerk Billing and Stripe without ever touching card data. Use this skill when you need to set up subscription payments, handle webhooks, implement payment gating, understand PCI-DSS compliance, or integrate Stripe Checkout. Triggers include "payment", "Stripe", "Clerk Billing", "subscription", "PCI-DSS", "credit card", "payment security", "checkout", "webhook", "billing".

Comprehensive Flow Nexus platform management - authentication, sandboxes, app deployment, payments, and challenges

Add features by description. User says WHAT, AI figures out HOW.Use when: user wants to add functionality to existing app.Triggers: "add auth", "add payments", "add search", "добавь","integrate", "connect".

Use when integrating Paddle payments, setting up subscriptions, configuring webhooks, or debugging billing issues. Covers sandbox testing and production deployment.

Expert at verifying subscription logic, chapter limits, premium feature gates, and freemium flows. Use when implementing or debugging subscription checks, usage limits, premium features, or payment flows.

Comprehensive toolkit for building applications with JPYC (Japanese Yen Pegged Coin). Use this skill when developing with JPYC token, implementing payment features, integrating JPYC SDK, deploying JPYC contracts to Base Sepolia, or building DApps with JPYC. Supports both JPYC SDK v1 usage and direct Solidity smart contract development with Hardhat, ethers.js, viem, Next.js, and React.

Third-party integration connectors for MyDetailArea. Implements secure API integrations with accounting software (QuickBooks, Xero), CRM systems, inventory management, payment processors, and webhooks. Includes OAuth flows, API authentication, rate limiting, error handling, and data synchronization patterns. Use when connecting external systems or building API integrations.

Professional invoice and payment system for MyDetailArea dealership management. Creates invoices with itemization, tax calculations, payment tracking, and multi-format output (HTML/PDF/Excel). Includes email delivery, payment recording, and financial reporting. Use when creating invoices, recording payments, generating financial documents, or managing billing workflows.

Use when working with authentication, API routes, user input, or sensitive data. Audits code for security vulnerabilities based on OWASP Top 10. Critical for payment processing, auth systems, and data handling.

Stripe integration templates with reusable code for Checkout, Payment Intents, and Subscriptions. Use when implementing Stripe payments, building checkout flows, handling subscriptions, or integrating payment processing.

SaaS architecture, multi-tenancy, and subscription management

Integrates payments and subscriptions with Lemon Squeezy merchant of record platform. Use when selling digital products, SaaS subscriptions, or software licenses with built-in tax handling.

Implement Stripe Connect payments for PhotoVault marketplace using destination charges. Use when working with checkout sessions, webhook handlers, platform subscriptions ($22/month), commission splits (50/50), Connect onboarding, failed payment handling (dunning), or debugging payment issues. Includes idempotency patterns and PhotoVault product IDs.

Use when building applications with Weavr for payments, cards, accounts, and identity verification. Covers both API integration and secure UI components.