diff --git a/backend/api/Documents-service/src/models/document.py b/backend/api/Documents-service/src/models/document.py
index 82d8c25..7bcc58c 100644
--- a/backend/api/Documents-service/src/models/document.py
+++ b/backend/api/Documents-service/src/models/document.py
@@ -1,8 +1,3 @@
-from sqlalchemy import Column, Integer, String
-
-from database import Base
-
-
 class Document(Base):
     __tablename__ = "documents"
 
diff --git a/backend/api/Documents-service/src/models/document_schema.py b/backend/api/Documents-service/src/models/document_schema.py
index ac12019..48493be 100644
--- a/backend/api/Documents-service/src/models/document_schema.py
+++ b/backend/api/Documents-service/src/models/document_schema.py
@@ -1,20 +1,18 @@
-from typing import Optional
-
-from pydantic import BaseModel
 
 
 class DocumentBase(BaseModel):
     title: str
     content: str
     author: Optional[str] = None
-
-
+      
+      
 class DocumentCreate(DocumentBase):
     pass
 
-
+  
 class Document(DocumentBase):
     id: int
 
     class Config:
         orm_mode = True
+   
\ No newline at end of file
diff --git a/backend/api/ExternalTools-service/adapters/__init__.py b/backend/api/ExternalTools-service/adapters/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/backend/api/ExternalTools-service/adapters/ai.py b/backend/api/ExternalTools-service/adapters/ai.py
new file mode 100644
index 0000000..01c832f
--- /dev/null
+++ b/backend/api/ExternalTools-service/adapters/ai.py
@@ -0,0 +1,8 @@
+from .manager import ExternalTool
+
+
+class AIServiceAdapter(ExternalTool):
+    def execute(self, data):
+        # Lógica de IA simulada
+        content = data.get("content", "")
+        return {"summary": content[:100], "sentiment": "positive"}
diff --git a/backend/api/ExternalTools-service/adapters/manager.py b/backend/api/ExternalTools-service/adapters/manager.py
new file mode 100644
index 0000000..da951f4
--- /dev/null
+++ b/backend/api/ExternalTools-service/adapters/manager.py
@@ -0,0 +1,13 @@
+from abc import ABC, abstractmethod
+from typing import Any
+
+
+class ExternalTool(ABC):
+    @abstractmethod
+    def execute(self, data: Any) -> dict:
+        pass
+
+
+class ExternalToolManager:
+    def use_tool(self, tool: ExternalTool, data: Any) -> dict:
+        return tool.execute(data)
diff --git a/backend/api/ExternalTools-service/adapters/payment.py b/backend/api/ExternalTools-service/adapters/payment.py
new file mode 100644
index 0000000..26548e7
--- /dev/null
+++ b/backend/api/ExternalTools-service/adapters/payment.py
@@ -0,0 +1,8 @@
+from .manager import ExternalTool
+
+
+class PaymentAdapter(ExternalTool):
+    def execute(self, data):
+        # Logica simulada de procesamiento de pago
+        amount = data.get("amount", 0)
+        return {"status": "success", "charged": amount}
diff --git a/backend/api/ExternalTools-service/adapters/storage.py b/backend/api/ExternalTools-service/adapters/storage.py
new file mode 100644
index 0000000..a17ad38
--- /dev/null
+++ b/backend/api/ExternalTools-service/adapters/storage.py
@@ -0,0 +1,8 @@
+from .manager import ExternalTool
+
+
+class CloudStorageAdapter(ExternalTool):
+    def execute(self, data):
+        # Logica simulada de URL de almacenamiento
+        filename = data.get("filename", "file.txt")
+        return {"url": f"https://storage.example.com/{filename}"}
diff --git a/backend/api/ExternalTools-service/main.py b/backend/api/ExternalTools-service/main.py
new file mode 100644
index 0000000..549ab37
--- /dev/null
+++ b/backend/api/ExternalTools-service/main.py
@@ -0,0 +1,36 @@
+from fastapi import FastAPI, Depends, HTTPException
+from adapters.ai import AIServiceAdapter
+from adapters.payment import PaymentAdapter
+from adapters.storage import CloudStorageAdapter
+from adapters.manager import ExternalToolManager
+from fastapi.security import HTTPBasic, HTTPBasicCredentials
+
+
+app = FastAPI()
+security = HTTPBasic()
+
+
+def require_auth(credentials: HTTPBasicCredentials = Depends(security)):
+    if credentials.username != "admin" or credentials.password != "123":
+        raise HTTPException(status_code=401, detail="Unauthorized")
+
+
+@app.post("/analyze")
+def analyze(data: dict, _=Depends(require_auth)):
+    tool = AIServiceAdapter()
+    manager = ExternalToolManager()
+    return manager.use_tool(tool, data)
+
+
+@app.post("/pay")
+def pay(data: dict, _=Depends(require_auth)):
+    tool = PaymentAdapter()
+    manager = ExternalToolManager()
+    return manager.use_tool(tool, data)
+
+
+@app.get("/storage-url")
+def get_storage_url(filename: str, _=Depends(require_auth)):
+    tool = CloudStorageAdapter()
+    manager = ExternalToolManager()
+    return manager.use_tool(tool, {"filename": filename})