# API

**Application Program Interface (API)** allows Valorx Fusion App to call Salesforce Webservices. Salesforce will allow to create API using external platforms. Designers can create an Apex Class in **Salesforce** by logging into your **Org Id** or they can even use the existing or predefined API enabled classes.

* Refer [**Exposing Apex Classes as REST Web Services**](https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/apex_rest.htm).
* Refer [**Exposing APEX Methods as SOAP Web Services**](https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/apex_web_services.htm).

Create a Apex Class in Salesforce. Once a class is created then, open an app from **Connections List** in **Design Studio**, and click on **Task** and select **New API Task**.

![](/files/psMAv9VY5IetOSvnVZyX)

**API Task** window will open which will have Class Name, Name, Classes and Actions.

![](/files/Q72ACZhLbWOPLLOi6eXo)

Follow the below steps to create and run an API through Valorx Fusion.

* Provide the name of the API task under **Class Name**.
* Select the class from the drop-down provided under "*Classes*".
* Select the **Actions** from the drop-down ( Method that we used to create API task).
* Parameter Mapping will be displayed depending on the Actions selected.
* Select where to display the results under Return Type Mapping.
* Click **Save**.


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