The Signinghub API helps accomplish something that looks simple (see image below) but is tricky to do securely: digitally sign a document. The API, using REST-based web services with XML responses, makes its possible to incorporate digital signing into your application that is based on the Public Key Infrastructure.
Thirteen APIs have been added to the ProgrammableWeb directory in categories including Hosting, Security, Data-as-a-Service, and Air Travel. Featured today is an API for HIPPA and UETA compliant electronic signature service eSign Genie. Here's a rundown of the latest additions.