Question for Embedded Signing API call

Hi, our team is doing some research for the integration for Adobe sign. 

I'm looking for your API that support something like DocuSign, Embedded Signing, DocuSign Embedding API page

What we are trying to achieve is, we can create agreement without sending the email first then we can let users sign or send documents directly from our side UI design instead. 

Not sure did you support this in Adobe Sign, if yes, any document link for this please? 

Thank you. 

Alicia