diff --git a/backend/common/core/schemas.py b/backend/common/core/schemas.py
new file mode 100644
index 0000000..6d9d75f
--- /dev/null
+++ b/backend/common/core/schemas.py
@@ -0,0 +1,60 @@
+from fastapi import HTTPException, Request
+from fastapi.security import OAuth2PasswordBearer
+from pydantic import BaseModel
+from sqlmodel import SQLModel
+from starlette.status import HTTP_403_FORBIDDEN, HTTP_401_UNAUTHORIZED
+from common.core.config import settings
+from fastapi.security.utils import get_authorization_scheme_param
+from typing import Generic, TypeVar, Optional
+class TokenPayload(BaseModel):
+    account: str | None = None
+    id: int | None = None
+    oid: int | None = None
+    
+class Token(SQLModel):
+    access_token: str
+    token_type: str = "bearer"
+    
+class XOAuth2PasswordBearer(OAuth2PasswordBearer):
+    async def __call__(self, request: Request) -> Optional[str]:
+        authorization = request.headers.get(settings.TOKEN_KEY)
+        if request.headers.get(settings.ASSISTANT_TOKEN_KEY):
+            authorization = request.headers.get(settings.ASSISTANT_TOKEN_KEY)
+        scheme, param = get_authorization_scheme_param(authorization)
+        
+        if not authorization or scheme.lower() not in  ["bearer", "assistant"]:
+            if self.auto_error:
+                raise HTTPException(
+                    status_code=HTTP_401_UNAUTHORIZED,
+                    detail="Not authenticated",
+                    headers={"WWW-Authenticate": "Bearer"},
+                )
+            else:
+                return None
+        return param
+    
+
+
+
+T = TypeVar('T')
+
+class PaginationParams(BaseModel):
+    page: int = 1
+    size: int = 20
+    order_by: Optional[str] = None
+    desc: bool = False
+
+class PaginatedResponse(BaseModel, Generic[T]):
+    items: list[T]
+    total: int
+    page: int
+    size: int
+    total_pages: int
+    
+
+class BaseCreatorDTO(BaseModel):
+    id: int
+    class Config:
+        json_encoders = {
+            int: lambda v: str(v) if isinstance(v, int) and v > (2**53 - 1) else v
+        }
\ No newline at end of file