Using Arcadier's APIs as a marketplace owner is simply a matter of getting on the Enterprise package. Your developer can work with our APIs to build a mobile app, third party applications or even craft an entirely new marketplace (On Enterprise) from the API building blocks that Arcadier provides.
As a developer, you can learn more about our APIs at the link here. You can also build a sandbox marketplace here.
If you are a marketplace owner and you are hoping for an integration with a particular application or business tool, you can also request it in our Feature Request community page.