Redmine

The query parameter to filter by author is author_id. Your URL should thus be:

https://myredmine/issues.json?key=mykey&from=2023-02-01&to=2023-12-31&author_id=me

but I wanted it to return the Issues that I updated at some point and not the ones I created.

In that case, the query key is updated_by. This will return issues where you (or the selected user) has performed any updates, i.e. if there are any journals authored by the user.

You have plenty of paging examples in the API documentation link. https://www.redmine.org/projects/redmine/wiki/Rest_Issues

GET /issues.xml
GET /issues.xml?issue_id=1
GET /issues.xml?issue_id=1,2
GET /issues.xml?project_id=2
GET /issues.xml?project_id=2&tracker_id=1
GET /issues.xml?assigned_to_id=6
GET /issues.xml?assigned_to_id=me
GET /issues.xml?status_id=closed
GET /issues.xml?status_id=*
GET /issues.xml?cf_1=abcdef
GET /issues.xml?sort=category:desc,updated_on

Paging example:
GET /issues.xml?offset=0&limit=100
GET /issues.xml?offset=100&limit=100

To fetch issues for a date range (uncrypted filter is "><2012-03-01|2012-03-07") :
GET /issues.xml?created_on=%3E%3C2012-03-01|2012-03-07

To fetch issues created after a certain date (uncrypted filter is ">=2012-03-01") :
GET /issues.xml?created_on=%3E%3D2012-03-01

Or before a certain date (uncrypted filter is "<= 2012-03-07") :
GET /issues.xml?created_on=%3C%3D2012-03-07

To fetch issues created after a certain timestamp (uncrypted filter is ">=2014-01-02T08:12:32Z") :
GET /issues.xml?created_on=%3E%3D2014-01-02T08:12:32Z

To fetch issues updated after a certain timestamp (uncrypted filter is ">=2014-01-02T08:12:32Z") :
GET /issues.xml?updated_on=%3E%3D2014-01-02T08:12:32Z

To fetch issues for which custom field 4 contains the substring "foo" :
GET /issues.xml?cf_4=~foo