# Accessing the Talend Data Preparation REST API documentation

REST API simplifies your interaction with the data stored on the Talend Data Preparation server by using a number of methods or request types.

You can access all REST API documentation pages based on Swagger and run requests. You can download a JSON file from any of the REST API documentation pages.

## Procedure

1. Launch all the modules in the Talend Data Preparation installation folder.

   Information noteNote: To access Talend Data Preparation REST API, you must first set the value of the service.documentation parameter to true in the <Installation\_Path>/dataprep/config/application.properties configuration file.
2. Open a Web browser window and enter the following URL, where host and port correspond to the URL of your Talend Data Preparation instance:

   https://<host>:<port>/swagger-ui/

   The Data Preparation API page opens and operations are classified into different categories as shown below:

   ![](https://help.qlik.com/talend/en-US/data-preparation-user-guide/Resources/images/access_swagger_1.png)
3. Click a category name to display the operation list under the category.
4. From the category list:
   | Select | To |
   | --- | --- |
   | Show/Hide | Show or hide all operations |
   | List Operations | Expand or collapse the operation list |
   | Expand Operations | Expand the details of an operation |
5. Start testing the execution of different operations.