# Cooper Email changelog

> Release notes for the public API, MCP tools, and docs. Operated by Avatar 8 LLC (ops@avatar33.com).

HTML: https://cooperemail.com/changelog · RSS: https://cooperemail.com/changelog.xml

## 2026-10-07 — Batch & temporary inboxes, custom domains, sub-accounts

- Batch inbox creation POST /api/v1/inboxes/batch with per-plan caps (Free 5, Starter 25, Pro 100).
- Temporary inboxes via ttl_hours/expires_at with auto-cleanup.
- Label filter GET /api/v1/inboxes?label=.
- DELETE /api/v1/inboxes/{id}.
- One-call custom domains POST /api/v1/domains returning SPF/DKIM/DMARC/MX/verify records, with a domain.verified webhook (Starter+).
- Sub-accounts POST/GET /api/v1/workspaces with scoped keys and quotas rolling up to the parent.
- New MCP tools cooper_create_inboxes, cooper_add_domain, cooper_create_workspace, cooper_list_workspaces, cooper_delete_inbox (21 tools total).
- New /quickstart 'Disposable email inbox per AI agent run'.