Use Bulk Jobs functionality to pull data from Jira (using JQL) and push to target web services (e.g. Workday Timesheet).
Here’s how you can define a bulk job. OnLink keeps track of last time the job ran, so you can use smart values like {last_successful_rundate} or {last_successful_runtime} in your JQL. OnLink will automatically replace these values with actual date or date-time values are run time.
You can specify the webservice request body as shown below. If {worklog.<field>} is used, then OnLink will automatically pull all worklog entries, as each issue can have more than one worklog.
The {worklog.author.accountId.getid('workspaceid', 'asset object name', 'atlassian user object name')} can be used to reverse map Jira User ID to Workday ID. This mapping is driven from JSM Assets object that maps Jira User to Workday ID. Note that the Workday ID field should be the label on the object. To get the Workspace ID, you can run this URL: https://yourinstancename.atlassian.net/rest/servicedeskapi/assets/workspace