List tickets, newest first. Filter by status (open/closed/resolved/archived or numeric id) and department. Paginated.

Full-text search tickets by subject. Optional status filter and pagination.

Get one ticket with full detail including the message thread. Each thread entry may include an "attachments" array (fileId, name, type, size, inline, cid); pass an attachment's numeric fileId to osticket_download_attachment. Provide number or id.

Aggregate ticket statistics: total, open, closed, overdue.

List all ticket statuses with their canonical state.

Create a new ticket. Requires subject and message.

Update a ticket: change status, set/clear due date, change help topic, and/or add an internal staff note.

Post a customer-facing reply to a ticket. This is emailed to the ticket's user.

Permanently delete a ticket and its thread. Irreversible.

Link a child ticket under a parent (parent/child relationship).

Remove a child ticket's parent link.

List all child tickets of a parent ticket.

Get the parent ticket of a child ticket (null if none).

Download a ticket attachment by its numeric file id (from a thread entry's attachments[].fileId in osticket_get_ticket), returned as base64.