Currently you cannot search/filter custom objects by any of their associations like you can with other objects in the HubSpot tenant.
Our use case would be allowing our CS team to easily search for special prices that are active in the system by searching the company the price is attached to.
Status: Idea Submitted
I’ve built a handful of integrations and having this capability would significantly improve complexity and efficiency. At the moment we’re left with doing two calls (get associations, batch get custom objects) and performing additional filters via code.
I’ve seen some nice API enhancements lately, this would definately be one of them!