At the moment, POST /almaws/v1/users/{userid}/loans/{loanid} must be called individually for each loan. This is very time-consuming, especially in large accounts, and the general API limits must also be observed. It would be conceivable, for example, to introduce the loanid ALL, similar to GET /almaws/v1/bibs/{mmsid}/holdings/{holdingid}/items for the holdingid.

The "Retrieve Items list" has a feature, where ALL can be used for the holdingid parameter to retrieve all items from all holdings. In a similar way we could use POST /users/{userid}/loans/ALL to renew all loans.

Using POST /almaws/v1/users/{user_id}/loans as the most obvious solution is not possible, as this web service is already in use for creating a loan.