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Lookup User by App User Id

  • May 11, 2026
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I’m trying to set up an integration with the v2 API. I will need to create a RevCat customer if one does not already exist for this person, so I will need to search for a customer by app user id (and create a new customer if one is not found).  But I can’t find any API that allows me to find customers by app user id (which is the only thing we have on our backend).  How can I do this?

Best answer by wes_clark

Hi! I apologize for the confusion regarding the use of customer_id in the documentation, rather than app_user_id. You actually will be able to use the app user ID that you have on your end in order to make a Get Customer call. You can use that to check before calling the Create Customer endpoint

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1 reply

wes_clark
RevenueCat Staff
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  • RevenueCat Staff
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  • May 13, 2026

Hi! I apologize for the confusion regarding the use of customer_id in the documentation, rather than app_user_id. You actually will be able to use the app user ID that you have on your end in order to make a Get Customer call. You can use that to check before calling the Create Customer endpoint