I was just wondering if you had any information on how I would achieve form prefills where the form is sitting within wordpress. I have found myself in the same position, being able to call and receive data but not sure how to piece it all together.
Not sure what you're asking, Kurt.
Or you can create a webservice and invoke it via XHR while/after the document content loads (preventing API slowdowns from affecting site performance) and call setValues in the callback.
One work around that I've done in the past is to use a Marketo form and populate it on the landing page via an iframe. It's not an ideal solution, but it allows you to use the pre-fill functionality of a Marketo form on the page that you desire, without the security concerns.
This is a much more reasonable solution than people give it credit for -- I'd much rather see IFRAMEs than these other fragile solutions.