> For the complete documentation index, see [llms.txt](https://developer.celenity.net/api-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.celenity.net/api-documentation/overview/introduction.md).

# Introduction

#### **Overview**

**Introduction**

While the Celenity  API is free to explore for everyone, you will need a Celenity account to use it. After the easy sign-up process, you will get your API key and Base URL which is all you need to start using our API.

* **Base URL**: `https://api.celenity.net/v1`
* **Authentication**: All API requests must be authenticated using an API key.