diff --git a/fidelius/gateway/file/__init__.py b/fidelius/gateway/file/__init__.py
new file mode 100644
index 0000000..a40e345
--- /dev/null
+++ b/fidelius/gateway/file/__init__.py
@@ -0,0 +1,2 @@
+from ._filerepo import *
+from ._fileadmin import *
diff --git a/fidelius/gateway/file/_fileadmin.py b/fidelius/gateway/file/_fileadmin.py
new file mode 100644
index 0000000..e69de29
diff --git a/fidelius/gateway/file/_filerepo.py b/fidelius/gateway/file/_filerepo.py
new file mode 100644
index 0000000..ad7e28b
--- /dev/null
+++ b/fidelius/gateway/file/_filerepo.py
@@ -0,0 +1,36 @@
+__all__ = [
+    'MockFideliusRepo',
+]
+
+from fidelius.structs import *
+from fidelius.gateway._abstract import *
+
+import json
+
+import logging
+log = logging.getLogger(__name__)
+
+
+class MockFideliusRepo(_BaseFideliusRepo):
+    def __init__(self, app_props: FideliusAppProps, pre_seeded_cache: Optional[Union[dict, str]] = None, **kwargs):
+        super().__init__(app_props, **kwargs)
+        self._cache: Dict[str, str] = {}
+        self._loaded: bool = False
+
+        self._pre_seeded_cache = pre_seeded_cache
+
+    def get_app_param(self, name: str, env: Optional[str] = None) -> Optional[str]:
+        self._load_all()
+        return self._cache.get(self.get_full_path(name, env=env), None)
+
+    def get_shared_param(self, name: str, folder: str, env: Optional[str] = None) -> Optional[str]:
+        self._load_all()
+        return self._cache.get(self.get_full_path(name, folder=folder, env=env), None)
+
+    def _load_all(self):
+        if not self._loaded:
+            if isinstance(self._pre_seeded_cache, dict):
+                self._cache = self._pre_seeded_cache
+            elif isinstance(self._pre_seeded_cache, str) and self._pre_seeded_cache.lower().endswith('.json'):
+                with open(self._pre_seeded_cache, 'r') as fin:
+                    self._cache = json.load(fin)