---
title: Custom Field Schemas
subtitle: >-
  Returns all Custom Fields for a given object type in the order you have
  defined.
---

A Custom Field Schema presents you with *all* (regular and shared) Custom Fields that belong on a given object, in the order you've defined. It's the best endpoint to use when asking "What Custom Fields can I set on this object?"

The `object_type` in the URL can be one of: `lead`, `contact`, `opportunity`, `activity/<cat_id>`, `custom_object/<cotype_id>`.