---
page_title: Integration Architecture
product: Express Checkout API
page_source: https://docs.test.juspay.io/ec-api-barclays/docs/overview/integration-architecture
llms_txt: https://docs.test.juspay.io/llms.txt
product_llms_txt: https://docs.test.juspay.io/ec-api-barclays/llms.txt
---


# Integration Architecture   



![Image](https://dth95m2xtyv8v.cloudfront.net/tesseract/assets/ec-api/image%20(19).png)



> **Warning**
> This document serves as a step-by-step guide for configuring Express Checkout APIs. For a complete overview of all our APIs, please refer to this document - [API Reference](https://docs.juspay.in/api-reference-barclays). It provides detailed instructions and insights to help you effectively leverage our APIs for all your integration needs.



---

## See Also

- [Pre-Requisites](https://docs.test.juspay.io/ec-api-barclays/docs/overview/pre-requisites)