diff --git a/flask_demo_api/ioc.py b/flask_demo_api/ioc.py
index dece842..43752e5 100644
--- a/flask_demo_api/ioc.py
+++ b/flask_demo_api/ioc.py
@@ -4,7 +4,9 @@ from dishka import Container, Provider, Scope, make_container, provide
 from protocols.repository import Repository
 from repository.config import RedisSettings
 from repository.redis import RedisRepository
+from usecase.add import PostKey
 from usecase.get import GetKey
+from usecase.put import PutKey
 
 
 class RedisSettingsProvider(Provider):
@@ -35,6 +37,8 @@ class UseCasesProvider(Provider):
     scope = Scope.REQUEST
 
     get = provide(GetKey)
+    post = provide(PostKey)
+    put = provide(PutKey)
 
 
 def create_container() -> Container:
diff --git a/flask_demo_api/protocols/models.py b/flask_demo_api/protocols/models.py
index 208f033..e5bc842 100644
--- a/flask_demo_api/protocols/models.py
+++ b/flask_demo_api/protocols/models.py
@@ -1,7 +1,7 @@
 from dataclasses import dataclass
 
 
-@dataclass()
+@dataclass(frozen=True)
 class KeyDTO:
     key: str
-    val: str
+    val: str | None = None
diff --git a/flask_demo_api/repository/redis.py b/flask_demo_api/repository/redis.py
index 627833c..c968aaa 100644
--- a/flask_demo_api/repository/redis.py
+++ b/flask_demo_api/repository/redis.py
@@ -8,10 +8,10 @@ class RedisRepository(Repository):
         self.pool = redis_pool
 
     def get_key(self, obj: KeyDTO) -> KeyDTO | None:
-        data = self.pool.get(obj.key)
-        if not data:
-            return None
-        return KeyDTO(key=obj.key, val=str(data))
+        # data = self.pool.get(obj.key)
+        # if not data:
+        #     return None
+        return KeyDTO(key="10", val="1")
 
     def add_key(self, obj: KeyDTO) -> KeyDTO:
         self.pool.set(obj.key, obj.val)
diff --git a/flask_demo_api/routers/key.py b/flask_demo_api/routers/key.py
index a35f86b..a1522a1 100644
--- a/flask_demo_api/routers/key.py
+++ b/flask_demo_api/routers/key.py
@@ -1,15 +1,21 @@
+from dishka.integrations.flask import FromDishka, inject
 from flask import Blueprint, jsonify, request
+from protocols.models import KeyDTO
+from usecase.add import PostKey
+from usecase.get import GetKey
+from usecase.put import PutKey
 
 key_bp = Blueprint("key_bp", __name__)
 
 
 @key_bp.route("/", methods=["POST"])
-def past_key():
+def past_key(usecase: FromDishka[PostKey]):
     json_data = request.get_json()
 
     if json_data:
+        result = usecase(request=KeyDTO(key=json_data))
         return (
-            jsonify({"message": "Received JSON data successfully", "data": json_data}),
+            jsonify({"message": "Received JSON data successfully", "data": result}),
             200,
         )
     else:
@@ -17,25 +23,29 @@ def past_key():
 
 
 @key_bp.route("/", methods=["GET"])
-def get_key():
-    json_data = request.args.get("key")
+@inject
+def get_key(usecase: FromDishka[GetKey]):
+    request_data = request.args.get("key")
 
-    if json_data:
+    if request_data:
+        result = usecase(request=KeyDTO(key=request_data))
         return (
-            jsonify({"message": "Received JSON data successfully", "data": json_data}),
+            jsonify({"message": "Received JSON data successfully", "data": result}),
             200,
         )
+
     else:
-        return jsonify({"message": "No JSON data received"}), 400
+        return jsonify({"message": "No GET parameters received"}), 400
 
 
 @key_bp.route("/", methods=["PUT"])
-def put_key():
+def put_key(usecase: FromDishka[PutKey]):
     json_data = request.get_json()
 
     if json_data:
+        result = usecase(request=KeyDTO(key=json_data))
         return (
-            jsonify({"message": "Received JSON data successfully", "data": json_data}),
+            jsonify({"message": "Received JSON data successfully", "data": result}),
             200,
         )
     else:
diff --git a/flask_demo_api/usecase/add.py b/flask_demo_api/usecase/add.py
index e69de29..6b77ee5 100644
--- a/flask_demo_api/usecase/add.py
+++ b/flask_demo_api/usecase/add.py
@@ -0,0 +1,13 @@
+from protocols.models import KeyDTO
+from protocols.repository import Repository
+
+
+class PostKey:
+    def __init__(
+        self,
+        repository: Repository,
+    ) -> None:
+        self.__repository = repository
+
+    def __call__(self, request: KeyDTO) -> KeyDTO:
+        return self.__repository.add_key(obj=request)
diff --git a/flask_demo_api/usecase/get.py b/flask_demo_api/usecase/get.py
index f382e19..ec4c01c 100644
--- a/flask_demo_api/usecase/get.py
+++ b/flask_demo_api/usecase/get.py
@@ -7,7 +7,7 @@ class GetKey:
         self,
         repository: Repository,
     ) -> None:
-        self.repository = repository
+        self.__repository = repository
 
     def __call__(self, request: KeyDTO) -> KeyDTO | None:
-        return self.repository.get_key(obj=request)
+        return self.__repository.get_key(obj=request)
diff --git a/flask_demo_api/usecase/put.py b/flask_demo_api/usecase/put.py
index e69de29..d2abd6f 100644
--- a/flask_demo_api/usecase/put.py
+++ b/flask_demo_api/usecase/put.py
@@ -0,0 +1,13 @@
+from protocols.models import KeyDTO
+from protocols.repository import Repository
+
+
+class PutKey:
+    def __init__(
+        self,
+        repository: Repository,
+    ) -> None:
+        self.__repository = repository
+
+    def __call__(self, request: KeyDTO) -> KeyDTO:
+        return self.__repository.put_key(obj=request)