Originally, I wrote up my experiences and thoughts about integrating PhotoShelter with WordPress in a fairly long article on this page. I, however, recently moved away from PhotoShelter after using them for ten years. As a result, I felt that it would be appropriate to delete my write-up. Additionally, I removed the possibility to download the various PhotoShelter widgets that I developed in the past. I will provide them upon request though.
PhotoShelter unfortunately no longer offers the customisation and SEO features that I want. I might come back to that decision once PhotoShelter completes the development roadmap that they embarked upon about a year ago. This site now uses WordPress and WooCommerce, in combination with a bunch of plugins that allow me to sell both prints and licences.
If you have questions, feel free to ask! Cheers 🙂