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.