diff --git a/pyproject.toml b/pyproject.toml
index 5efe6f1..b58a7d9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -52,6 +52,9 @@ extend-exclude = ["alembic", "tests"]
 [tool.ruff.lint]
 select = ["E", "F", "I", "N", "UP", "B", "A", "SIM"]
 
+[tool.ruff.lint.flake8-bugbear]
+extend-immutable-calls = ["Depends", "fastapi.Depends", "Query", "fastapi.Query"]
+
 [tool.mypy]
 plugins = ["pydantic.mypy"]
 strict = true
\ No newline at end of file
diff --git a/src/proxy_pool/common/router.py b/src/proxy_pool/common/router.py
new file mode 100644
index 0000000..19ac7dd
--- /dev/null
+++ b/src/proxy_pool/common/router.py
@@ -0,0 +1,36 @@
+from fastapi import APIRouter, Depends
+from redis.asyncio import Redis
+from sqlalchemy import text
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from proxy_pool.common.dependencies import get_db, get_redis
+from proxy_pool.common.schemas import HealthResponse
+
+router = APIRouter(tags=["system"])
+
+
+@router.get("/health", response_model=HealthResponse)
+async def health_check(
+    db: AsyncSession = Depends(get_db),
+    redis: Redis = Depends(get_redis),
+) -> HealthResponse:
+    pg_status = "connected"
+    try:
+        await db.execute(text("SELECT 1"))
+    except Exception:
+        pg_status = "error"
+
+    redis_status = "connected"
+    try:
+        await redis.ping()
+    except Exception:
+        redis_status = "error"
+
+    return HealthResponse(
+        status="healthy"
+        if pg_status == "connected" and redis_status == "connected"
+        else "degraded",
+        postgres=pg_status,
+        redis=redis_status,
+        version="0.1.0",
+    )
diff --git a/src/proxy_pool/common/schemas.py b/src/proxy_pool/common/schemas.py
new file mode 100644
index 0000000..41d2fe3
--- /dev/null
+++ b/src/proxy_pool/common/schemas.py
@@ -0,0 +1,8 @@
+from pydantic import BaseModel
+
+
+class HealthResponse(BaseModel):
+    status: str
+    postgres: str
+    redis: str
+    version: str
diff --git a/src/proxy_pool/proxy/schemas.py b/src/proxy_pool/proxy/schemas.py
new file mode 100644
index 0000000..4d2743e
--- /dev/null
+++ b/src/proxy_pool/proxy/schemas.py
@@ -0,0 +1,53 @@
+from datetime import datetime
+from uuid import UUID
+
+from pydantic import BaseModel, Field
+
+from proxy_pool.proxy.models import AnonymityLevel, ProxyProtocol, ProxyStatus
+
+
+class ProxySourceCreate(BaseModel):
+    url: str = Field(max_length=2048)
+    parser_name: str = Field(max_length=64)
+    cron_schedule: str | None = Field(default=None, max_length=64)
+    default_protocol: ProxyProtocol = ProxyProtocol.HTTP
+
+
+class ProxySourceUpdate(BaseModel):
+    url: str | None = Field(default=None, max_length=2048)
+    parser_name: str | None = Field(default=None, max_length=64)
+    cron_schedule: str | None = None
+    default_protocol: ProxyProtocol | None = None
+    is_active: bool | None = None
+
+
+class ProxySourceResponse(BaseModel):
+    model_config = {"from_attributes": True}
+
+    id: UUID
+    url: str
+    parser_name: str
+    cron_schedule: str | None
+    default_protocol: ProxyProtocol
+    is_active: bool
+    last_scraped_at: datetime | None
+    created_at: datetime
+
+
+class ProxyResponse(BaseModel):
+    model_config = {"from_attributes": True}
+
+    id: UUID
+    ip: str
+    port: int
+    protocol: ProxyProtocol
+    status: ProxyStatus
+    anonymity: AnonymityLevel | None
+    exit_ip: str | None
+    country: str | None
+    score: float
+    avg_latency_ms: float | None
+    uptime_pct: float | None
+    last_checked_at: datetime | None
+    first_seen_at: datetime
+    created_at: datetime