📄️ Introduction
A55 Payment API — cards, PIX, wallets, and subscriptions across 7 LATAM countries with 29 acquirers.
📄️ Quickstart
Go from zero to a working credit card charge in 5 minutes using the A55 sandbox API.
📄️ Authentication
OAuth 2.0 client credentials flow with AWS Cognito — obtain, cache, and refresh Bearer tokens for all A55 API requests in cURL, Python, and JavaScript.
📄️ Environment
Sandbox and production share the same API URL — your Cognito credentials select the environment. Set up both, make your first call, and go live safely.
📄️ Credentials
How A55 credentials work — entity_uuid, merchant_uuid, client_id, client_secret, wallet_uuid — and how to manage them securely.
📄️ Test Cards
Sandbox credit card simulator — use the last digit to control approval, decline, timeout, and every edge case. Includes ready-to-run examples in cURL, Python, and JavaScript.
📄️ Integration Overview
H2H, SDK, and Checkout Page: choose an integration model by control level, time to market, UX flexibility, and 3DS handling. Includes decision tree, comparison matrix, and responsibility breakdown.
📄️ Onboarding
Step-by-step onboarding process from initial contact to production launch with A55 payment API.
📄️ Go-Live Checklist
Complete checklist of 23 items to verify before switching from sandbox to production with A55.