PHASE 2 COMPLETE: REST API Implementation

✅ Fully functional FastAPI server with comprehensive features:

🏗️ Architecture:
- Complete API design documentation
- Modular structure (models, auth, service, main)
- OpenAPI/Swagger auto-documentation

🔧 Core Features:
- Memory CRUD endpoints (POST, GET, DELETE)
- User management and statistics
- Search functionality with filtering
- Admin endpoints with proper authorization

🔐 Security & Auth:
- API key authentication (Bearer token)
- Rate limiting (100 req/min configurable)
- Input validation with Pydantic models
- Comprehensive error handling

🧪 Testing:
- Comprehensive test suite with automated server lifecycle
- Simple test suite for quick validation
- All functionality verified and working

🐛 Fixes:
- Resolved Pydantic v2 compatibility (.dict() → .model_dump())
- Fixed missing dependencies (posthog, qdrant-client, vecs, ollama)
- Fixed mem0 package version metadata issues

📊 Performance:
- Async operations for scalability
- Request timing middleware
- Proper error boundaries
- Health monitoring endpoints

🎯 Status: Phase 2 100% complete - REST API fully functional

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

start_api.py

@@ -0,0 +1,62 @@
+#!/usr/bin/env python3
+"""
+Start the Mem0 API server
+"""
+
+import os
+import sys
+import uvicorn
+import logging
+
+# Add current directory to path for imports
+sys.path.insert(0, '/home/klas/mem0')
+
+from api.main import app
+
+# Configure logging
+logging.basicConfig(
+    level=logging.INFO,
+    format='%(asctime)s - %(name)s - %(levelname)s - %(message)s'
+)
+logger = logging.getLogger(__name__)
+
+def main():
+    """Start the API server"""
+    
+    # Set environment variables with defaults
+    os.environ.setdefault("API_HOST", "localhost")
+    os.environ.setdefault("API_PORT", "8080")
+    os.environ.setdefault("API_KEYS", "mem0_dev_key_123456789,mem0_test_key_987654321")
+    os.environ.setdefault("ADMIN_API_KEYS", "mem0_admin_key_111222333")
+    os.environ.setdefault("RATE_LIMIT_REQUESTS", "100")
+    os.environ.setdefault("RATE_LIMIT_WINDOW_MINUTES", "1")
+    
+    host = os.getenv("API_HOST")
+    port = int(os.getenv("API_PORT"))
+    
+    logger.info("=" * 60)
+    logger.info("🚀 STARTING MEM0 MEMORY SYSTEM API")
+    logger.info("=" * 60)
+    logger.info(f"📍 Server: http://{host}:{port}")
+    logger.info(f"📚 API Docs: http://{host}:{port}/docs")
+    logger.info(f"🔐 API Keys: {len(os.getenv('API_KEYS', '').split(','))} configured")
+    logger.info(f"👑 Admin Keys: {len(os.getenv('ADMIN_API_KEYS', '').split(','))} configured")
+    logger.info(f"⏱️  Rate Limit: {os.getenv('RATE_LIMIT_REQUESTS')}/min")
+    logger.info("=" * 60)
+    
+    try:
+        uvicorn.run(
+            app,
+            host=host,
+            port=port,
+            log_level="info",
+            access_log=True
+        )
+    except KeyboardInterrupt:
+        logger.info("🛑 Server stopped by user")
+    except Exception as e:
+        logger.error(f"❌ Server failed to start: {e}")
+        sys.exit(1)
+
+if __name__ == "__main__":
+    main()