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sidebar_label: 'Overview'
sidebar_position: 1
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# External Payment Provider Overview

:::note
Information in this section is in preview status. Do not use information in this section without being in contact with Future Ordering.
:::

This section describes how to build a custom external payment provider integration with Future Ordering. It covers the asynchronous payment lifecycle, required API contracts between Future Ordering and the partner, and how operation outcomes are reported through event notifications.

## In this section

1. [External Payment Provider](./external-payment-integration-guide)
2. [External Payment Operations Endpoint](./external-payment-operations-endpoint)
3. [External Payment - Flow Descriptions](./external-payment-sequence-diagrams)
4. [External Payment - Error Responses](./error-responses)