diff --git a/api/core/agent/tools/dynamic/registry.py b/api/core/agent/tools/dynamic/registry.py
new file mode 100644
index 0000000000..25d2f1f2bb
--- /dev/null
+++ b/api/core/agent/tools/dynamic/registry.py
@@ -0,0 +1,24 @@
+from collections.abc import Callable
+from typing import Any
+
+
+class DynamicToolRegistry:
+    """
+    Registry for dynamic tool injection in Dify agents.
+    Allows injecting custom tool logic at runtime without service restarts.
+    """
+
+    def __init__(self):
+        self._tools: dict[str, Callable] = {}
+
+    def register_tool(self, name: str, func: Callable):
+        self._tools[name] = func
+
+    def get_tool(self, name: str) -> Callable:
+        return self._tools.get(name)
+
+    def execute_tool(self, name: str, **kwargs) -> Any:
+        tool = self.get_tool(name)
+        if not tool:
+            raise ValueError(f"Tool {name} not found in dynamic registry.")
+        return tool(**kwargs)