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tomtoto757
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secure-checkout

Harden ecommerce checkout pages with TLS enforcement, CSP headers, and payment tokenization.

3|1|Updated Mar 21, 2026
Search Tags:#PCI DSS#tokenization#HTTPS#XSS prevention#Content Security Policy#checkout security#stripe elements
One-click install
npx skills add https://github.com/tomtoto757/ecomm-ai-team --skill secure-checkout-tomtoto757
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: secure-checkout
Source: https://github.com/tomtoto757/ecomm-ai-team/tree/main/skills/platform-integrations-infrastructure/finsilabs/security-compliance/secure-checkout
Command: npx skills add https://github.com/tomtoto757/ecomm-ai-team --skill secure-checkout-tomtoto757

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve? Payment pages are the highest-value target for Magecart-style card skimming attacks, and a single XSS vulnerability can expose thousands of card numbers. This Skill guides you through enforcing HTTPS, configuring strict Content Security Policies, isolating third-party scripts, and tokenizing card data so your servers never touch raw payment details. ## Core Features & Use Cases - Platform-Specific Hardening: Step-by-step checkout security setup for Shopify, WooCommerce, BigCommerce, and custom/headless storefronts. - Security Headers & CSP: Implement HSTS, X-Frame-Options, nonce-based Content Security Policy in Next.js middleware, and CSP violation reporting endpoints. - Payment Tokenization & Validation: Integrate Stripe Elements to keep card data off your server and validate checkout input with Zod schemas. - Use Case: After a penetration test flags missing headers on your Next.js checkout, use this Skill to add global security headers, a per-request nonce CSP compatible with Stripe iframes, and a CSP report endpoint that alerts on checkout-page violations. ## Quick Start Ask the AI to audit and harden your checkout flow by adding HTTPS enforcement, a nonce-based Content Security Policy, Stripe Elements tokenization, and removal of non-essential third-party scripts from payment pages.

Frequently Asked Questions about secure-checkout

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I secure a checkout page against Magecart attacks?▼

Enforce HTTPS everywhere, apply a strict nonce-based Content Security Policy on payment pages, remove non-essential third-party scripts from checkout, and use payment tokenization like Stripe Elements so card data never touches your server. Monitor CSP violations as an early warning of injection attempts.

How to add a Content Security Policy in Next.js middleware?▼

Generate a unique nonce per request with crypto.randomUUID(), build the policy string with script-src using that nonce, and set the Content-Security-Policy header in middleware. Pass the nonce downstream so layout components can apply it to script tags, avoiding 'unsafe-inline'.

Does Shopify handle checkout security automatically?▼

Shopify provisions SSL certificates, manages checkout CSP, and tokenizes payments through Shopify Payments automatically. You still need to review theme code for suspicious scripts, manage Customer Events pixels, remove unused apps, and enforce 2FA on staff accounts.

Why does my CSP break Stripe Elements iframes?▼

Stripe Elements requires https://js.stripe.com in script-src and both https://js.stripe.com and https://hooks.stripe.com in frame-src. Check Stripe's current CSP documentation for the complete allowlist, and load Stripe.js from the CDN rather than bundling it.

What payment gateway minimizes PCI DSS scope for WooCommerce?▼

Use Stripe Elements (SAQ A-EP) or redirect-based options like Stripe Checkout or PayPal Standard (SAQ A), where card data never touches your server. Avoid gateways that post raw card numbers to your server, which forces SAQ D compliance.

Should analytics and chat scripts load on checkout pages?▼

No. Third-party scripts on payment pages create supply chain risk if a vendor is compromised. Exclude analytics, advertising pixels, and chat widgets from checkout routes using conditional loading, platform script managers, or a separate checkout layout.

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