'Check JIRA REST API version?

How to check, that rest api is enabled in JIRA and it has appropriate version?

I know, that it is possible to request 'api/latest', but if latest installed version isn't compatible with methods, that i call?

Solution 1:^[1]

View page source of Jira page and search version.

Sample output:

<meta name="application-name" content="JIRA" data-name="jira" data-version="7.9.2"><meta name="ajs-server-scheme" content="http">

Use the /rest/serverInfo endpoint, e.g. /rest/api/2/serverInfo.

This should return a JSON string with JIRA version, e.g.

{
...
    "version": "8.x.x",
...
}

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Solution	Source
Solution 1	ZygD
Solution 2	kenorb