Xero Accounting

The Xero Accounting API is a RESTful web service that uses the OAuth1 protocol to authenticate 3rd party applications. JSON formatted responses are supported and allows you to upload an attachment against an existing document, download the content of a specific attachments, retrieve any bank transfers, create contact groups and more. Xero APIs expose accounting and related functions of the main Xero application and includes features for; creating transactions, invoices and credit notes, extracting accounting data etc. Xero provides cloud based accounting software to simplify accounting and bookkeeping processes.