Guides

Integration guides for WinkPG: how the pieces fit together, what to send, and what comes back. Each one is written for a developer, so it carries requests and payloads rather than walkthroughs of the administration screens.

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Concepts

How Timezones Are Handled The UTC storage model, the display conversion boundary, and the timezone policy applied to API payloads, exports, and generated documents.

Integration

Getting Started with the API Find the API reference, create an API key, authenticate your first call, and handle idempotency, rate limits, and timestamps correctly.
Webhook Integration Receive, verify, and deduplicate WinkPG platform events at your own HTTPS endpoint.
Reusing a Saved Card with Payment Tokens Capture the reusable payment token returned when a card is saved, then charge the stored card again without handling card data.
Hosted Payment Page Iframe Integration Embed the Hosted Payment Page in an iframe and communicate over the postMessage lifecycle protocol.
The Embedded Payments SDK Mount the hosted payment form inside your own page with the browser loader: options, events, session lifecycle, script pinning, and Content Security Policy.
Embedded Payments Compared With In-Page Card Collection How a gateway-hosted embedded payment form differs from a direct card-collection script, and what changes for your servers when you move.

Payments

Transaction Lifecycle and Settlement What authorized, captured, and settled mean, when the money actually moves, and which undo operation to use.
ACH Payments How a bank debit clears, where to take one, and how to read its status from submission through settlement or return.
Transaction Custom Fields Define your own fields, collect them on a payment page or through the API, and carry them on the transaction record.