diff --git a/app/models.py b/app/models.py
new file mode 100644
index 0000000..3cfc5db
--- /dev/null
+++ b/app/models.py
@@ -0,0 +1,47 @@
+from datetime import datetime
+
+from sqlalchemy import Boolean, DateTime, Float, ForeignKey, Integer, String, Text
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.database import Base
+
+
+class User(Base):
+    __tablename__ = "users"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, index=True)
+    email: Mapped[str] = mapped_column(String(255), unique=True, index=True, nullable=False)
+    password_hash: Mapped[str] = mapped_column(String(255), nullable=False)
+    rating: Mapped[float] = mapped_column(Float, default=0.0)
+    points: Mapped[int] = mapped_column(Integer, default=0)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+
+    sessions: Mapped[list["Session"]] = relationship(back_populates="user", cascade="all, delete-orphan")
+    external_data: Mapped[list["ExternalData"]] = relationship(
+        back_populates="user", cascade="all, delete-orphan"
+    )
+
+
+class Session(Base):
+    __tablename__ = "sessions"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, index=True)
+    user_id: Mapped[int] = mapped_column(ForeignKey("users.id"), nullable=False, index=True)
+    token: Mapped[str] = mapped_column(String(64), unique=True, index=True, nullable=False)
+    is_active: Mapped[bool] = mapped_column(Boolean, default=True)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+    expires_at: Mapped[datetime] = mapped_column(DateTime, nullable=False)
+
+    user: Mapped["User"] = relationship(back_populates="sessions")
+
+
+class ExternalData(Base):
+    __tablename__ = "external_data"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, index=True)
+    user_id: Mapped[int] = mapped_column(ForeignKey("users.id"), nullable=False, index=True)
+    source: Mapped[str] = mapped_column(String(128), nullable=False)
+    payload: Mapped[str] = mapped_column(Text, nullable=False)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+
+    user: Mapped["User"] = relationship(back_populates="external_data")
diff --git a/app/schemas.py b/app/schemas.py
new file mode 100644
index 0000000..0dc051c
--- /dev/null
+++ b/app/schemas.py
@@ -0,0 +1,51 @@
+from datetime import datetime
+
+from pydantic import BaseModel, EmailStr, Field
+
+
+class UserRegister(BaseModel):
+    email: EmailStr
+    password: str = Field(min_length=6, max_length=128)
+
+
+class UserLogin(BaseModel):
+    email: EmailStr
+    password: str
+
+
+class UserPublic(BaseModel):
+    id: int
+    email: str
+    rating: float
+    points: int
+    created_at: datetime
+
+    class Config:
+        from_attributes = True
+
+
+class SessionPublic(BaseModel):
+    id: int
+    created_at: datetime
+    expires_at: datetime
+    is_active: bool
+
+    class Config:
+        from_attributes = True
+
+
+class ExternalDataCreate(BaseModel):
+    source: str = Field(min_length=1, max_length=128)
+    payload: dict | str
+    points_delta: int = 0
+    rating_delta: float = 0.0
+
+
+class ExternalDataPublic(BaseModel):
+    id: int
+    source: str
+    payload: str
+    created_at: datetime
+
+    class Config:
+        from_attributes = True