{"message":"Document Classification API","version":"1.0.0","endpoints":{"POST /classify":"Classify a PDF document and extract year","GET /drop":"Drag and drop file upload interface","GET /docs":"API documentation (Swagger UI)"},"supported_document_types":["1040","W2","1098","1099","ID Card","Handwritten Notes","OTHER"],"security_features":{"max_file_size_mb":4,"allowed_mime_types":["application/pdf"],"rate_limit_requests_per_day":100,"rate_limit_file_uploads_per_day":10,"content_validation":"PDF header validation + MIME type checking"}}