- segments `list`, `create`, `update`, `delete`, and `count`, including `--match any`, nested filter roots, custom event filters, and saved-segment composition filters
- templates `list`, `get`, `create`, `update`, and `delete`, with `list` supporting label filters and `create`/`update` accepting labels, raw HTML, or Sequenzy block JSON
- campaigns `list`, `get`, `create`, `update` including label and reply-to updates, `schedule`, and `test`, with `list` supporting label filters, `create` accepting labels plus raw HTML, Sequenzy block JSON, or prompt-generated content, `update` accepting labels plus raw HTML or Sequenzy block JSON, and `schedule` returning a review preview link
- campaign lifecycle control with `campaigns cancel` (stops scheduled, paused, waiting-approval, or sending campaigns immediately, no confirmation prompt), `campaigns pause` and `campaigns resume` for an active send (resume supports `--spread-over-hours`), `campaigns delete` (blocked while sending, scheduled, or paused - cancel first), and `campaigns duplicate` with `--mode campaign|ab_test|variant`
- ab-tests `list`, `get`, `stats`, `restart`, `update-variant`, `create`, `add-variant`, `delete-variant`, and `delete`; create/add-variant/delete-variant/delete work on campaign A/B tests in draft status, variant A is the protected control, and `restart` reruns a finished sequence A/B test
- MCP template and campaign tools support labels on list/create/update; MCP `update_campaign` also supports `replyTo` and `replyProfileId`, and MCP `schedule_campaign` schedules draft or already scheduled campaigns
- MCP `search_subscribers` supports list filters through `list`, `listId`, or `listName`; MCP `add_subscribers_to_list` accepts up to 500 emails per call