# Introduction

 The Rightsline API is organized around a [REST](http://en.wikipedia.org/wiki/Representational_State_Transfer) architecture. Our API is designed to have predictable, resource-oriented URLs and to use HTTP response codes to indicate API errors. We use built-in HTTP features, like HTTP authentication and HTTP verbs, which can be understood by off-the-shelf HTTP clients. [JSON](http://www.json.org/) will be returned in all responses from the API, including errors.