eWAY Rapid API
The eWAY Rapid API is a versioned HTTP payments API (v47) for processing card transactions. It exposes transaction creation (Direct Connection), AccessCode-based flows (Transparent Redirect / Responsive Shared Page / Secure Fields), transaction query by ID, and token-customer, refund, and cancel-authorisation operations. Supports REST/JSON (recommended), plus SOAP, XML, and RPC formats. Authentication is HTTP Basic (API key as username, password as password) with an X-EWAY-APIVERSION header.