1 files changed, 5 insertions, 1 deletions
diff --git a/packages/core/src/mcp/oauth-provider.ts b/packages/core/src/mcp/oauth-provider.ts
index 491ec477..5052e8af 100644
--- a/packages/core/src/mcp/oauth-provider.ts
+++ b/packages/core/src/mcp/oauth-provider.ts
@@ -308,7 +308,11 @@ export class MCPOAuthProvider {
       );
     }
 
-    return `${config.authorizationUrl}?${params.toString()}`;
+    const url = new URL(config.authorizationUrl!);
+    params.forEach((value, key) => {
+      url.searchParams.append(key, value);
+    });
+    return url.toString();
   }
 
   /**