📄️ Status Lifecycle
Ordered charge statuses, terminal states, action table, and state transition diagram across the payment lifecycle.
📄️ Response Codes
Error and response codes returned by the A55 API with troubleshooting guidance and suggested actions.
📄️ Glossary
Trilingual glossary of 50+ payment industry terms used in A55 documentation (EN / PT-BR / zh-CN).
📄️ Changelog
API and documentation changelog for the A55 payment platform.
📄️ Provider Capabilities
Country, currency, and payment method coverage for A55 processing routes with enablement steps.
📄️ Debug Tips
How to debug A55 API integration issues — request_id tracking, error responses, webhook debugging, and cURL techniques.
📄️ Common Mistakes
Top 15 mistakes developers make when integrating with A55 payment API, and how to fix each one.
📄️ Rate Limiting
A55 API rate limit policy — limits, headers, 429 handling, and retry strategies with code examples.
📄️ Idempotency
How to use idempotency keys to prevent duplicate charges and ensure safe retries with the A55 API.
📄️ BIN Lookup
Identify card brand, issuer, and card type from the first 6-8 digits of a PAN. Combine with antifraud and 3DS for layered risk decisions.
📄️ FX Rates
Get real-time exchange rates, display prices in your customer's currency, and create charges with automatic multi-currency conversion across 8 currencies and 56 pairs.
📄️ MCP Server
Access A55 documentation through the Model Context Protocol. Connect your AI coding assistant or IDE to search and retrieve API docs programmatically.
📄️ Visual Design System
Design tokens, custom MDX components, layout principles, and information architecture decisions applied to A55 documentation.