> For the complete documentation index, see [llms.txt](https://docs.iyzico.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.iyzico.com/en/getting-started/preliminaries/api-reference-beta.md).

# API Reference (Beta)

With iyzico APIs, you can manage the entire payment journey end-to-end — from one-time payments to subscription management, from marketplace flows to reporting.

The values shown in the **Authorization** header in the examples are for demonstration purposes only. You must generate and use your own HASH signature.\
You can access the documentation for the authentication steps [**here**](/en/getting-started/preliminaries/authentication.md).

Don’t forget to visit our [**GitHub**](https://github.com/iyzico) page for sample codes in different programming languages and our [Postman collection](/en/getting-started/preliminaries/postman-collections.md) for ready-to-use requests.