From their site: The FreeAgent API provides secure programmatic access to the FreeAgent service, allowing you to build cool and useful tools and services on top. You can access FreeAgent data, such as Company, Clients, Projects, Tasks, Invoices, Invoice Items, Timeslips, Users, and Expenses. FreeAgent is a streamlined money management tool for busy freelancers. It takes care of your money, letting you get on with running your business.
The following is a list of SDKs from our SDK directory that matched your search term. Though your definition of an SDK may differ, in our world, we define SDKs as platform- specific tools for consuming existing APIs of the sort we list in our API directory. For example, the Ruby SDK for consuming the Twitter Ads API. If you think an SDK, API, or other asset is missing from our directory, be sure to check our guidelines for making contributions to ProgrammableWeb.