Merge pull request #765 from howardjohn/inspector/error-popup

Add a toast on connection error

client/src/lib/hooks/useConnection.ts

@@ -828,6 +828,12 @@ export function useConnection({
           description: `Server declares logging capability but doesn't implement method: "${lastRequest}"`,
           variant: "destructive",
         });
+      } else {
+        toast({
+          title: "Connection error",
+          description: `Connection failed: "${e}"`,
+          variant: "destructive",
+        });
       }
       console.error(e);
       setConnectionStatus("error");

server/src/mcpProxy.ts

@@ -36,7 +36,9 @@ export default function mcpProxy({
           id: message.id,
           error: {
             code: -32001,
-            message: error.message,
+            message: error.cause
+              ? `${error.message} (cause: ${error.cause})`
+              : error.message,
             data: error,
           },
         };