diff --git a/src/netius/adapters/base.pyi b/src/netius/adapters/base.pyi
new file mode 100644
index 00000000..74b0f25d
--- /dev/null
+++ b/src/netius/adapters/base.pyi
@@ -0,0 +1,16 @@
+from typing import Any, BinaryIO, Sequence
+
+class BaseAdapter:
+    def set(self, value: Any, owner: str = ...): ...
+    def get(self, key: str) -> bytes | None: ...
+    def get_file(self, key: str, mode: str = ...) -> BinaryIO: ...
+    def delete(self, key: str, owner: str = ...): ...
+    def append(self, key: str, value: Any): ...
+    def truncate(self, key: str, count: int): ...
+    def size(self, key: str) -> int: ...
+    def sizes(self, owner: str | None = ...) -> list[int]: ...
+    def total(self, owner: str | None = ...) -> int: ...
+    def reserve(self, owner: str = ...): ...
+    def count(self, owner: str | None = ...) -> int: ...
+    def list(self, owner: str | None = ...) -> Sequence[str]: ...
+    def generate(self) -> str: ...
diff --git a/src/netius/adapters/fs.pyi b/src/netius/adapters/fs.pyi
new file mode 100644
index 00000000..d900ceb4
--- /dev/null
+++ b/src/netius/adapters/fs.pyi
@@ -0,0 +1,11 @@
+from os import PathLike
+
+from netius import BaseAdapter
+
+class FsAdapter(BaseAdapter):
+    base_path: str
+
+    def __init__(self, base_path: str | None = ...) -> None: ...
+    def _path(self, owner: str | None = ...) -> str: ...
+    def _ensure(self, owner: str) -> str: ...
+    def _symlink(self, source: PathLike[str], target: PathLike[str]) -> None: ...
diff --git a/src/netius/adapters/memory.pyi b/src/netius/adapters/memory.pyi
new file mode 100644
index 00000000..184f59b2
--- /dev/null
+++ b/src/netius/adapters/memory.pyi
@@ -0,0 +1,8 @@
+from typing import Any, BinaryIO, Callable
+
+from netius import BaseAdapter
+
+class MemoryAdapter(BaseAdapter):
+    def __init__(self): ...
+    def _ensure(self, owner: str) -> dict[str, Any]: ...
+    def _build_close(self, file: BinaryIO, key: str) -> Callable[[], None]: ...
diff --git a/src/netius/adapters/mongo.pyi b/src/netius/adapters/mongo.pyi
new file mode 100644
index 00000000..545e27b9
--- /dev/null
+++ b/src/netius/adapters/mongo.pyi
@@ -0,0 +1,4 @@
+from netius import BaseAdapter
+
+class MongoAdapter(BaseAdapter):
+    pass
diff --git a/src/netius/adapters/null.pyi b/src/netius/adapters/null.pyi
new file mode 100644
index 00000000..af22525b
--- /dev/null
+++ b/src/netius/adapters/null.pyi
@@ -0,0 +1,4 @@
+from netius import BaseAdapter
+
+class NullAdapter(BaseAdapter):
+    pass