{"service":"Second Brain API","version":"2.0.0","status":"running","docs":"/api/docs","api_key_enabled":true,"endpoints":{"GET /api/health":"Health check (no auth)","GET /api/search":"Semantic and text search","GET /api/recent":"Recently modified nodes","POST /api/capture":"Capture single knowledge item","POST /api/capture/batch":"Capture multiple items","GET /api/entities":"List entities with filtering","GET /api/entities/{id}":"Get entity with relationships","PATCH /api/entities/{id}":"Update entity properties","DELETE /api/entities/{id}":"Delete entity","POST /api/relationships":"Create relationship","DELETE /api/relationships":"Delete relationship","GET /api/relationships/{id}":"Get entity relationships","GET /api/stats":"Graph statistics"}}