diff --git a/src/scope/core/plugins/__init__.py b/src/scope/core/plugins/__init__.py
index a681707d7..fcf208413 100644
--- a/src/scope/core/plugins/__init__.py
+++ b/src/scope/core/plugins/__init__.py
@@ -3,6 +3,7 @@
 from .hookspecs import hookimpl
 from .manager import (
     FailedPluginInfo,
+    PluginBundledError,
     PluginDependencyError,
     PluginInstallError,
     PluginInUseError,
@@ -32,4 +33,5 @@
     "PluginNameCollisionError",
     "PluginDependencyError",
     "PluginInstallError",
+    "PluginBundledError",
 ]
diff --git a/src/scope/core/plugins/manager.py b/src/scope/core/plugins/manager.py
index 87ee5a48a..399bea71e 100644
--- a/src/scope/core/plugins/manager.py
+++ b/src/scope/core/plugins/manager.py
@@ -80,6 +80,12 @@ class PluginInstallError(Exception):
     pass
 
 
+class PluginBundledError(PluginInstallError):
+    """Attempted to uninstall a bundled (built-in) plugin."""
+
+    pass
+
+
 @dataclass(frozen=True)
 class FailedPluginInfo:
     """Information about a plugin entry point that failed to load."""
@@ -1360,7 +1366,7 @@ def _uninstall_plugin_sync(
 
         # Prevent uninstalling bundled plugins
         if plugin_info.get("bundled"):
-            raise PluginInstallError(
+            raise PluginBundledError(
                 f"Plugin '{name}' is bundled and cannot be uninstalled"
             )
 
diff --git a/src/scope/server/app.py b/src/scope/server/app.py
index 470771551..564a392a1 100644
--- a/src/scope/server/app.py
+++ b/src/scope/server/app.py
@@ -2957,6 +2957,7 @@ async def uninstall_plugin(
     cloud-hosted scope backend.
     """
     from scope.core.plugins import (
+        PluginBundledError,
         PluginInstallError,
         PluginNotFoundError,
         get_plugin_manager,
@@ -2991,6 +2992,12 @@ async def uninstall_plugin(
             status_code=404,
             detail=f"Plugin '{name}' not found",
         ) from e
+    except PluginBundledError as e:
+        logger.warning(f"Plugin uninstall rejected (bundled plugin): {name} - {e}")
+        raise HTTPException(
+            status_code=400,
+            detail=str(e),
+        ) from e
     except PluginInstallError as e:
         logger.error(f"Plugin uninstall failed: {name} - {e}")
         raise HTTPException(