14 docs tagged with "reference"

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.

API and documentation changelog for the A55 payment platform.

Top 15 mistakes developers make when integrating with A55 payment API, and how to fix each one.

How to debug A55 API integration issues — request_id tracking, error responses, webhook debugging, and cURL techniques.

How to use idempotency keys to prevent duplicate charges and ensure safe retries with the A55 API.

Access A55 documentation through the Model Context Protocol. Connect your AI coding assistant or IDE to search and retrieve API docs programmatically.

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.

Three strategies for processing charges in EUR and USD — direct native-currency wallets, FX API conversion, and strategic multi-currency diversification to eliminate cross-border chargebacks.

Trilingual glossary of 50+ payment industry terms used in A55 documentation (EN / PT-BR / zh-CN).

Country, currency, and payment method coverage for A55 processing routes with enablement steps.

A55 API rate limit policy — limits, headers, 429 handling, and retry strategies with code examples.

Error and response codes returned by the A55 API with troubleshooting guidance and suggested actions.

Ordered charge statuses, terminal states, action table, and state transition diagram across the payment lifecycle.

Design tokens, custom MDX components, layout principles, and information architecture decisions applied to A55 documentation.