{"ok":true,"data":{"service":"arc-email-worker","version":"0.1.0","description":"Email infrastructure for Arc — receive, store, and send email","endpoints":{"GET /api/health":"Health check (public)","GET /api/messages":"List messages (requires X-Admin-Key)","GET /api/messages/:id":"Get single message (requires X-Admin-Key)","POST /api/messages/:id/read":"Mark as read (requires X-Admin-Key)","POST /api/send":"Send an email (requires X-Admin-Key)","GET /api/stats":"Email statistics, 60s cached (requires X-Admin-Key)","GET /api/schema-health":"DO SQLite index health + EXPLAIN QUERY PLAN (requires X-Admin-Key)","POST /api/subscribe":"Subscribe (double opt-in, public) — { email, source? }","GET /api/confirm/:token":"Confirm a pending subscription (public, HTML response)","GET /api/unsubscribe/:token":"Unsubscribe (public, HTML response)","GET /api/subscribers":"List subscribers, optional ?status= (requires X-Admin-Key)","GET /api/subscribers/stats":"Subscriber counts by status (requires X-Admin-Key)","POST /api/send-digest":"Send to an explicit recipient list — no auto fan-out (requires X-Admin-Key)"}}}