# Enable mock integration using the API Gateway console
<a name="how-to-mock-integration-console"></a>

You must have a method available in API Gateway. Follow the instructions in [Tutorial: Create a REST API with an HTTP non-proxy integration](api-gateway-create-api-step-by-step.md).

1. Choose an API resource and choose **Create method**.

   To create the method, do the following:

   1. For **Method type**, select a method. 

   1. For **Integration type**, select **Mock**.

   1. Choose **Create method**. 

   1. On the **Method request** tab, for **Method request settings**, choose **Edit**.

   1. Choose **URL query string parameters**. Choose **Add query string** and for **Name**, enter **scope**. This query parameter determines if the caller is internal or otherwise.

   1. Choose **Save**.

1. On the **Method response** tab, choose **Create response**, and then do the following:

   1. For **HTTP Status**, enter **500**.

   1. Choose **Save**.

1. On the **Integration request** tab, for **Integration request settings**, choose **Edit**.

1. Choose **Mapping templates**, and then do the following:

   1. Choose **Add mapping template**.

   1. For **Content type**, enter **application/json**. 

   1. For **Template body**, enter the following:

      ```
      {
        #if( $input.params('scope') == "internal" )
          "statusCode": 200
        #else
          "statusCode": 500
        #end
      }
      ```

   1. Choose **Save**.

1. On the **Integration response** tab, for the **Default - Response** choose **Edit**.

1. Choose **Mapping templates**, and then do the following:

   1. For **Content type**, enter **application/json**. 

   1. For **Template body**, enter the following:

      ```
      {
          "statusCode": 200,
          "message": "Go ahead without me"
      }
      ```

   1. Choose **Save**.

1. Choose **Create response**.

   To create a 500 response, do the following:

   1. For **HTTP status regex**, enter **5\$1d\$12\$1**. 

   1. For **Method response status**, select **500**.

   1. Choose **Save**.

   1. For **5\$1d\$12\$1 - Response**, choose **Edit**. 

   1. Choose **Mapping templates**, and then choose **Add mapping template**.

   1. For **Content type**, enter **application/json**. 

   1. For **Template body**, enter the following:

      ```
      {
          "statusCode": 500,
          "message": "The invoked method is not supported on the API resource."
      }
      ```

   1. Choose **Save**.

1.  Choose the **Test** tab. You might need to choose the right arrow button to show the tab. To test your mock integration, do the following:

   1. Enter `scope=internal` under **Query strings**. Choose **Test**. The test result shows:

      ```
      Request: /?scope=internal
      Status: 200
      Latency: 26 ms
      Response Body
      
      {
        "statusCode": 200,
        "message": "Go ahead without me"
      }
      
      Response Headers
      
      {"Content-Type":"application/json"}
      ```

   1. Enter `scope=public` under `Query strings` or leave it blank. Choose **Test**. The test result shows:

      ```
      Request: /
      Status: 500
      Latency: 16 ms
      Response Body
      
      {
        "statusCode": 500,
        "message": "The invoked method is not supported on the API resource."
      }
      
      Response Headers
      
      {"Content-Type":"application/json"}
      ```

You can also return headers in a mock integration response by first adding a header to the method response and then setting up a header mapping in the integration response. In fact, this is how the API Gateway console enables CORS support by returning CORS required headers.