The Makeleaps Developer API gives you access to create, edit and export your data in several convenient formats. The API is currently in beta, but is already being used by several customers to manage and automate their invoicing.
Our REST API supports JSON, JSONP, HTML and TXT resources and allows creating, viewing, editing, and mailing of invoices through Japan Post.
We are looking for users who would like to help us test out the API. If you would like access and are willing to give us feedback, please contact firstname.lastname@example.org and we will enable the API for your account and give you instructions on how to authenticate and use the API.