Hi,
My name is Joseba and i working in Edmmond, a retail company based in Madrid.
My topic is about if you can provided me any examples about how we can integrated your widget into our shopify. Our idea is to have a widget integrated in shipping page and when customer choose this type of shipping, our retail stores received an message about what they need to prepared.
Thanks in advanced.
Joseba
Hello Joseba 
I think this topic on integrating with Shopify will provide you with the information you need. Unfortunately we don’t have any examples of integration specific to Shopify but you might find our other client libraries useful to assist in you integration.
Update:
There is a Shopify plugin which has been created by a third party service, details can be found in the related post CMS plugins.