dotloop Transaction Management API
RESTful JSON CRUD API for real-estate transaction management - loops, loop details, folders, documents, participants, tasks, activities, contacts and loop templates - secured with three-legged OAuth 2.0. Served by dotloop, a Zillow Group company, on api-gateway.dotloop.com; Zillow Group lists it as one of its own developer APIs and links the dotloop reference directly, which is why the base host differs from zillowgroup.com. The full contract is profiled separately in the dotloop repo.