Google Pay Web Integration

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Guides the implementation and review of Google Pay Web integrations with accurate configuration properties, payment sheets, and security standards.

Google Pay Web Integration is a targeted knowledge patch that bridges the gap between older training cutoffs and current Google Pay Web merchant specifications. It equips Claude Code with exact parameters, enum values, and best practices for configuring payment sheets, handling Content Security Policy (CSP) nonces, parsing ISO 3166 administrative address formats, identifying card funding sources (credit, debit, prepaid), and implementing direct ECv2 signing keys. Developers building or auditing web checkouts can ensure compliance, avoid deprecated attributes, and leverage multi-market gateway testing without trial and error.

Key Features

0124 GitHub stars
02Manages payment methods and networks including INTERAC, PayPal, and ECv2 direct keys
03Enables multi-market testing across 27 global regions using gateway test cards
04Formats billing and shipping addresses to full ISO 3166 administrative area specifications
05Identifies card funding sources (Credit, Debit, Prepaid) for dynamic fee and discount rules
06Configures CSP nonces on dynamically injected scripts and styles for strict security compliance

Use Cases

01Implementing Content Security Policy nonces and custom border styling on Google Pay Web buttons
02Auditing an e-commerce checkout flow to ensure Google Pay integration parameters adhere to current web standards
03Configuring international address validation and payment sheet promo code displays via the OfferInfo API