The DocuSign eSignature REST v2.0 Python SDK allows developers to integrate the DocuSign eSignature REST API v2.0 into their Python applications. This SDK requires Python 2.7, but 3.6+ is recommended.
HelloSign has announced several feature updates to the HelloSign API aimed to improve the experience of developers, requesters, and signers. HelloSign API updates include unlimited templates for testing, API request limit per hour has been increased, custom redirect capability, and more.
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.