{"message":"Bedrock Chat API (FastAPI)","version":"1.0.0","endpoints":{"/api/chat":"POST - Send a chat message (SQL Agent)","/api/s3/chat":"POST - Send a chat message (S3 Agent)","/api/fs/chat":"POST - Send a chat message (File System Agent)","/api/unified/chat":"POST - Send a chat message (Unified Agent - SQL + S3 + File System)","/api/default/chat":"POST - Send a chat message (Default Agent - Claude open-domain)","/api/process-file":"POST - Process file for chat (PDF, CSV, Excel, etc.)","/api/health":"GET - Health check"}}