Are there any way to get all transition details including user who involved for given issue?

[Dushan Bhagya]

I want to get transition details and updated user details for each transition through jira rest api, is there any way to get it from jira rest api

[Nic Brough -Adaptavist-]

Have a look at https://developer.atlassian.com/server/jira/platform/jira-rest-api-examples/ - the bit you need to work with is the "expand", where you should send "changelog"