You want to view your current usage of the Marketo API.
Current usage of both REST and SOAP API can be found by following these steps:
- Go to Admin > Web Services
- Look at the API Call Information section.
In the API Call Information section, you will see a line that says "Requests in the Last 7 Days:". The number next to that is the number of calls made to this instance in that time frame.
The number is also a hyper-link that will allow you to break this down by API user. Each individual REST user will be its own row, while the SOAP requests will be in one line, using the given SOAP User ID within the SOAP API section just below.