> ## Documentation Index
> Fetch the complete documentation index at: https://voucherify-pw-further-tests.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction

> What is Voucherify API?

The Voucherify API is organized around REST.  Our API has predictable, resource-oriented URLs, and uses HTTP response codes to indicate API errors. We use built-in HTTP features, such as HTTP authentication and HTTP verbs, which are understood by off-the-shelf HTTP clients.

We support cross-origin resource sharing, allowing you to interact securely with our API from a client-side web application (though you should never expose your secret API key in any public website's client-side code).

JSON is returned by all API responses, including errors, although our API libraries convert responses to appropriate language-specific objects.

To make the API as explorable as possible, this documentation has a test mode. You can test all methods at no cost.

In general the API consists of 3 sets:

* **Application API** - full capability, designed to be accessed from your server application
* **Client API** - limited capability, designed to be accessed from your website or mobile application
* **Management API** - endpoints designed to manage Voucherify projects within organization. Enterprise feature only – contact [Voucherify sales team](https://www.voucherify.io/contact-sales "Contact Voucherify Sales") for more details.

> 📘 Your API keys
>
> Find out more about how to [authenticate your application](doc:authentication) to access the API.