# 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.


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.iyzico.com/en/getting-started/preliminaries/api-reference-beta.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.