Export tickets as CSV

Streams the project's tickets as a CSV download (tickets.csv, text/csv). Columns come from the ticket type's export fields; pass type (defaults to BUG) and optionally projection[] to pick specific fields. Supports startDate/endDate plus the usual ticket filters. For a JSON export use GET /tickets/export instead.

Like GET /tickets/export, this includes archived tickets by default (ignoreArchived is accepted and ignored) and exports ticket records only, not their conversations. Retention limits which conversations still exist — see GET /tickets.