# REST API Reference

The REST API Reference provides a comprehensive guide for developers looking to integrate seamlessly with 2Checkout's payment processing services. It offers detailed information on endpoints, request parameters, response structures, and authentication methods. 

By leveraging 2Checkout's REST API, vendors can efficiently implement payment gateways, manage transactions, and automate workflows, ensuring a faster time-to-market. The REST API enables developers to build robust, scalable integrations tailored to their specific needs, improving efficiency and enhancing the overall user experience.

<a href="https://openapi.gitbook.com/o/uOpE0pwQaikBOHcfkMgY/spec/2checkout.yaml" class="button primary" data-icon="arrow-up-right-from-square">Download the full OpenAPI spec</a>


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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.2checkout.com/api-reference/readme.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.