What's new in v2.0:
- 24 tools, covering email sending (single and batch, including templated batch sends), template management (create, edit, delete, validate), message search, bounce handling, suppressions, delivery stats, server info, and webhooks.
- diagnoseDelivery, a new composite tool that answers "did this email get delivered, and if not, why?" It checks suppression status, recent message history, and bounce records in one call, then returns a plain-English recommendation.
- Tool annotations for read-only versus mutating and destructive actions, so MCP clients can auto-approve safe reads (like checking stats) and require confirmation before anything that changes state (like deleting a template or registering a webhook).
- Tighter security defaults: structured logging with email addresses masked by default, HTTPS enforcement on webhook URLs, and an optional domain allowlist to restrict where webhooks can point.
Update your existing install, or set it up for the first time:
GitHub: https://github.com/ActiveCampaign/postmark-mcp
NPM: https://www.npmjs.com/package/@activecampaign/postmark-mcp
