diff --git a/mev_inspect/inspectors/__init__.py b/mev_inspect/inspectors/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/mev_inspect/inspectors/base.py b/mev_inspect/inspectors/base.py
new file mode 100644
index 0000000..2bb315f
--- /dev/null
+++ b/mev_inspect/inspectors/base.py
@@ -0,0 +1,11 @@
+from abc import ABC, abstractmethod
+from typing import Optional
+
+from mev_inspect.schemas.blocks import NestedTrace
+from mev_inspect.schemas.classifications import Classification
+
+
+class Inspector(ABC):
+    @abstractmethod
+    def inspect(self, nested_trace: NestedTrace) -> Optional[Classification]:
+        pass
diff --git a/mev_inspect/schemas/classifications.py b/mev_inspect/schemas/classifications.py
new file mode 100644
index 0000000..8a48e2f
--- /dev/null
+++ b/mev_inspect/schemas/classifications.py
@@ -0,0 +1,5 @@
+from pydantic import BaseModel
+
+
+class Classification(BaseModel):
+    pass