Get the authenticated Harvest user (name, email, id, roles, timezone). Useful to resolve 'my' time entries and check the connection.

List clients in the Harvest account. Returns id, name, active state.

List projects with their client, code, and budget info. Filter by client_id or include archived projects.

List the task assignments for a project (task_id + name). You need a task_id to log time or start a timer on that project.

List time entries, newest first. Filter by date range (from/to, YYYY-MM-DD), project_id, user_id, or only_running. Use mine=true to limit to the authenticated user. Returns up to 300 entries per call.

Aggregated hours for a date range, grouped by clients, projects, tasks, or team members. Includes billable vs total hours and billable amounts (when permitted). Perfect for 'how many hours did we spend on X this month?'

Create a completed time entry: project, task, date, and duration in hours (e.g. 1.5). Use list_projects and list_project_tasks first to get ids. Add a short note describing the work.

Start a running timer on a project + task for today (authenticated user). Any other running timer for the user is stopped automatically by Harvest. Use list_project_tasks to get the task_id.

Stop a running timer. If time_entry_id is omitted, finds and stops the authenticated user's currently running timer.

Edit an existing time entry's hours, notes, date, project, or task. Only provided fields are changed. (This server intentionally has no delete tool — set hours or move entries instead, and delete in Harvest itself if truly needed.)

List users in the Harvest account (id, name, email, roles). Needed for per-person filters and team reports. Requires admin/manager access.