APIM subscription and backend app token

Question

Hi,

We have a Websphere based api which has token corresponding to each consumer which they have to pass to be able to get the data from API. We are trying to virtualize this API through APIM. APIM has its own subscription key/token.

Is there any customization that can be done in APIM to map the APIM token to an internal token before making the backend API call?

So Consumer passes APIM token/key --> APIM indentifies the backend websphere key corresponding to the subscription through some mapping table --> Make the Websphere API call by passing webpshere key.

Answer 1

Hi @SBAM

There is no out of box feature that will help you in your scenario but you can write your custom logic in the function app (any database to store the mapping of WebSphere key corresponding to the subscription) or any other API services.

You can now call your middleware service from APIM using send-request policy and your service will return the right key that you can pass to your backend service.

References:
https://learn.microsoft.com/en-us/azure/api-management/api-management-advanced-policies#SendRequest
https://learn.microsoft.com/en-us/azure/api-management/api-management-sample-send-request