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How to add the API key verification protection function to the API created on SAP API Portal, this article introduces the corresponding analysis and solution in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible method.

Suppose I develop an API on SAP API Portal and don't want it to be called for free by anonymous users. In other words, this API can only be called if a consumer has a legitimate API.

This requirement can be easily achieved through one of the API policy released by the SAP cloud platform standard.

Open the API that you want to protect by calling, and click the policies hyperlink

In the coordinate flow region, select Preflow, and select the policy of Verify API key in Security policies on the right:

Create a new policy instance with the stream field set to incoming request:

Replace the ref default value for the APIKey tab.

After the modification is successful, click API url, and an error message will pop up:

```json

{"fault": {"faultstring": "Failed to resolve APIKey variable request.header. APIKey", "detail": ("errorcode": "steps.oauth.v2. FailedToResolveAPIKey"}

`

This is the answer to the question about how to add API key verification protection to the API created on SAP API Portal. I hope the above content can be of some help to you. If you still have a lot of doubts to be solved, you can follow the industry information channel for more related knowledge.

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