Is it possible to easily retrive the sum of all won deal values of a person? I find it strange that there is no such field in the Person Details method.
GET /deals/summary endpoint should cover this case (https://developers.pipedrive.com/docs/api/v1/#!/Deals/get_deals_summary).
You can filter won deals by user id, something like this
And response will include multiple fields related to the total value (based on currency)