About AAB Oracle
AAB Oracle is a technical reference site for developers integrating payment gateways, banking APIs, and open banking standards. All content is written for engineering teams building financial applications, with a focus on practical integration patterns, compliance requirements, and real-world implementation considerations.
Purpose
Payment integration involves navigating complex APIs, regulatory requirements like PCI DSS and PSD2, and a fragmented landscape of regional payment methods. This site consolidates integration guidance for major providers into a single reference, covering endpoint usage, authentication flows, webhook handling, error management, and compliance considerations. Each guide references the official API documentation of the respective provider.
What This Site Covers
- API Integration Guides -- Detailed walkthroughs for Stripe (Payment Intents, Connect, Subscriptions), Plaid (Link, Transactions, Auth), and Adyen (Drop-in, API-only, 3DS2)
- Standards and Compliance -- Open banking regulations (PSD2, UK Open Banking, FDX), PCI DSS compliance for developers (SAQ types, tokenization, scope reduction), and Strong Customer Authentication
- Implementation Patterns -- Webhook signature verification, idempotency handling, retry strategies, dead letter queues, and payment method configuration
- References -- Global payment method coverage, settlement times, fee ranges, error code catalogs, and troubleshooting guides
Intended Audience
This resource is designed for backend engineers, full-stack developers, technical architects, and engineering managers building payment and banking integrations. It assumes familiarity with REST APIs, HTTP, and server-side programming. PCI and compliance sections are written for technical teams working alongside compliance officers.
Provider Documentation
Content references the following official documentation sources:
- Stripe API Reference (stripe.com/docs/api)
- Plaid API Documentation (plaid.com/docs)
- Adyen API Explorer (docs.adyen.com/api-explorer)
- PCI Security Standards Council (pcisecuritystandards.org)
- European Banking Authority -- PSD2 Regulatory Technical Standards
- UK Open Banking Implementation Entity (openbanking.org.uk)
- Financial Data Exchange -- FDX API Standard (financialdataexchange.org)
Disclaimer
This site provides technical information about payment and banking API integrations. It does not constitute financial, legal, or compliance advice. API specifications, pricing, and regulatory requirements are subject to change. Always refer to official provider documentation and consult qualified professionals for guidance specific to your implementation.