> For a complete page index, fetch https://developer.close.com/llms.txt

# Custom Fields on Opportunities

Opportunities can now be associated with Custom Fields. A new API endpoint
allows you to create Opportunity Custom Fields. The Shared Custom Field APIs are
also extended to support associations with Opportunities. Values for Custom
Fields can now be attached to an Opportunity through the Opportunity API.

- [Opportunity Custom Field API](https://developer.close.com/api/resources/custom-fields/custom-fields-opportunity/list)