Does Jira have a history log and if yes can I access it by REST API

[sam smith]

Some apps have a history log which records what each user or team does throughout the time they use the app.

Does Jira have such a log file, and if yes can I access it using the REST API?

[jira guy]

Yes, you can access by adding expand=changelog to your rest query. 

/rest/api/2/issue/HT-10?expand=changelog

[DPKJ]

There is not standard rest API in Jira for activies/log but Jira provide stream API as a part of developer sdk for it.

You can find documentation related to this here - https://developer.atlassian.com/server/framework/atlassian-sdk/adding-activities-to-a-third-party-feed-with-the-rest-api/