API capability pack for bounded Postmark server-token calls against https://api.postmarkapp.com only. The pack can send one transactional email, send one template email, read server metadata, read message streams, search/read outbound and inbound message activity, inspect raw outbound dumps, review opens/clicks, read bounce delivery state, search/read templates, validate template content, read outbound stats, and manage message-stream suppressions. Enroll a Postmark server-token connection using header auth with X-Postmark-Server-Token; no credential is embedded in the manifest. Email sending, inbound retry/bypass, and suppression changes are write-tier and approval-gated. The pack intentionally excludes batch sending, template create/edit/delete, stream archive/unarchive, webhook configuration, server/account admin, sender/domain management, data-removal requests, and arbitrary API passthrough.