Create Rest API in Salesforce | Execute Rest API on Workbench

 Step 1: Create an Apex class for Rest API.

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@RestResource(urlMapping='/api/Account/*') global with sharing class MyFirstRestAPIClass { @HttpPost global static String doPost(String name,String phone,String AccountNumber ) { Account acc = new Account(); acc.Name = name; acc.Phone = phone; acc.AccountNumber = AccountNumber ; insert acc; return acc.id; } }

Step 2: Open the Workbench and log in with Salesforce Credential.

Step 3: Click on "Utilities (1)" and then click on the "REST Explorer".

Step 4: Select the POST radio button (2).

Step 5: Use the REST API URL (3).

As you can see, the class is annotated with @RestResource(urlMapping='/api/Account/*).
The base endpoint for Apex REST is
https://instance.salesforce.com/services/apexrest/.

The URL mapping is appended to the base endpoint to form the endpoint for your REST service.
For example, in the class example, the REST endpoint is
https://instance.salesforce.com/services/apexrest/api/Account/.

Step 6: Use the Request Body in JSON format and click on the Execute button (4).

{

  "name" : "My Rest API Account",

  "phone" : "9876543210",

  "AccountNumber" : "54321"

}

Step 7: Finally you will get the response with status code 200 (5).

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