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Test Your API Response MLE Key {#keys-rest-mle-test}
====================================================

Follow these steps to verify that your API response MLE key is working using the API Reference in the Developer Center. If you have not already created or submitted an API response MLE certificate, see [Create or Submit a REST---API Response MLE Key](/docs/cybs/en-us/security-keys/user/all/ada/security-keys/restgs-security-mle-reply.md "").

1. Go to the API Reference in the `Cybersource` Developer Center:  
   [`https://developer.cybersource.com/api-reference-assets/index.html#static-home-section`](https://developer.cybersource.com/api-reference-assets/index.md#static-home-section "")

2. Choose an API that supports MLE on the left navigation panel.  
   MLE support is indicated by **Request MLE** and **Response MLE** at the top of the screen.  
   ![](/content/dam/new-documentation/documentation/en-us/topics/platform/rest/getting-started/images/restgs-mle-tags.png/jcr:content/renditions/original)

3. Choose the **MLE Configuration** tab.

4. Enter your API response MLE key credentials in the Message Level Encryption Credentials section:

   * **Response encryption:** Enter the key ID of your API response MLE key.  
     This is the key ID that you saved in Step 10 in [Create or Submit a REST---API Response MLE Key](/docs/cybs/en-us/security-keys/user/all/ada/security-keys/restgs-security-mle-reply.md "").
   * **Response decryption:** Click **Browse** to submit your own decryption private key from your local system. Only *.p12* files are supported.

   ![](/content/dam/new-documentation/documentation/en-us/topics/platform/rest/getting-started/images/restgs-mle-dev-center-upload.png/jcr:content/renditions/original) {#keys-rest-mle-test_step-4}
   {#keys-rest-mle-test_step-4}

5. Click **Update Credentials**.

6. Click the Send drop-down menu icon ( ![](/content/dam/new-documentation/documentation/en-us/common/images/ebc/ebc-bttn-arrow-up.svg/jcr:content/renditions/original) ) in the Request: Live Console section and choose **Send Request with Message Level Encryption**.

7. Click **Send** .  
   ![](/content/dam/new-documentation/documentation/en-us/topics/platform/rest/getting-started/images/restgs-mle-dev-center-send.png/jcr:content/renditions/original)

8. If a *Success: HTTP Status Code: 201* message displays in the Response section, your API response key is properly configured.  
   ![](/content/dam/new-documentation/documentation/en-us/topics/platform/rest/getting-started/images/restgs-mle-ebc-success.png/jcr:content/renditions/original)  
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