> ## Documentation Index
> Fetch the complete documentation index at: https://docs.getoliver.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction

> An introduction to the Oliver Software veterinary API

<Note>
  This is a developer preview of our upcoming API. All endpoints are subject to change.
</Note>

## Authentication

All API endpoints are authenticated using JWT Bearer tokens in the Authorization header.

## Required Headers

In addition to the Authorization header, all requests must include the following headers:

* `Content-Type: application/json`
* `Accept: application/json`
* `X-Client-Id: <your-client-id>`
  * Required header that identifies which PIMS instance the request is intended for.
  * This unique identifier is provided by Oliver during the onboarding process.
  * Contact [engineering@getoliver.com](mailto:engineering@getoliver.com) if you need to obtain or verify your Client ID.