Thank you,
1 respuesta

You could set up debugging sessions (https://help.salesforce.com/articleView?id=code_monitoring_debug_logs.htm&siteLang=en_US&type=0)for any users being used for API integrations. You could also monitor login activity (https://help.salesforce.com/articleView?id=users_login_history.htm&type=0&language=en_US&release=208.16) to see which users are being used most frequently to login from remote applications to help narrow down what's maxing you out.
This won't give you the number of calls being made but it should at least help you narrow it down.