The Bexio Invoices Python Sample Code demonstrates how to access the API to fetch a list of all invoices. Query parameters define the order of the results, limit the number of results (max is 1000), and skip over a number of elements by specifying an offset value for the query.
ODesk claims to be the future of work, or more recently: "Work 3.0." So it should come as no surprise that the next version of work comes with an API. If you’re not familiar with the platform, oDesk provides contractors and companies with a hourly billing system which both verifies the work done for the company, and guarantees payment to the contractor.