We have a new documentation site. Please go here to see the latest.

Find Custom Field ID

The Custom field ID (e.g customfield_13244) is a unique identifier for a field that can be used in automation rules or to update field value via Jira REST API.

There are a few ways to find the custom field ID:

Jira Settings

REST API

There is also an API endpoint that allows getting the list of the custom fields along with their IDs: 

curl https://Your-Jira-URL/rest/api/2/field

Reference: https://developer.atlassian.com/cloud/jira/platform/rest/v3/api-group-issue-fields/#api-rest-api-3-field-get