Clean fix: MCP server with proper JSON returns and startup logging - 2025-10-04 15:14:29

app.py

@@ -206,11 +206,11 @@ def get_property_info(property_uri: str) -> str:
     if not prop_info:
         # Find partial matches
         matches = [k for k in kb.properties.keys() if property_uri.lower() in k.lower()]
-        return {
+        return json.dumps({
             "error": f"Property '{property_uri}' not found in BIBFRAME ontology",
             "suggestions": matches[:10] if matches else list(kb.properties.keys())[:10],
             "total_properties": len(kb.properties)
-        }
+        }, indent=2)
     
     # Generate examples based on range
     examples = _generate_property_examples(property_uri, prop_info)
@@ -250,11 +250,11 @@ def get_class_info(class_name: str) -> str:
     if not class_info:
         # Find partial matches
         matches = [k for k in kb.classes.keys() if class_name.lower() in k.lower()]
-        return {
+        return json.dumps({
             "error": f"Class '{class_name}' not found in BIBFRAME ontology",
             "suggestions": matches[:10] if matches else list(kb.classes.keys())[:10],
             "total_classes": len(kb.classes)
-        }
+        }, indent=2)
     
     # Find properties that have this class in their domain
     applicable_properties = []
@@ -346,7 +346,7 @@ def get_property_usage(property_name: str, class_name: str = "") -> str:
     prop_info = kb.properties.get(property_name, {})
     
     if not prop_info:
-        return {"error": f"Property '{property_name}' not found in BIBFRAME ontology"}
+        return json.dumps({"error": f"Property '{property_name}' not found in BIBFRAME ontology"}, indent=2)
     
     usage = {
         "property": property_name,
@@ -507,10 +507,18 @@ def create_interface():
     return demo
 
 if __name__ == "__main__":
+    print("🚀 Starting BIBFRAME MCP Server...")
+    
+    # Force ontology loading to show progress
+    kb.load_ontology()
+    print(f"✅ Loaded {len(kb.properties)} properties and {len(kb.classes)} classes")
+    
     demo = create_interface()
+    print("🔧 Launching with MCP server enabled...")
+    
     demo.launch(
         server_name="0.0.0.0",
         server_port=7860,
         show_api=True,
-        mcp_server=True  # Enable MCP server
+        mcp_server=True  # Enable MCP server at /gradio_api/mcp/sse
     )