diff --git a/apps/devops/app/common/config/site_settings.py b/apps/devops/app/common/config/site_settings.py
index 9a96914..c313636 100644
--- a/apps/devops/app/common/config/site_settings.py
+++ b/apps/devops/app/common/config/site_settings.py
@@ -23,6 +23,9 @@ class SiteSettings(BaseSettings):
     # TODO: confirm with Zhenyu
     BASE_RECONSILE_URL: str = "https://reconcile.freeleaps.mathmast.com"
 
+    # TODO: modify this with actual Loki URL
+    BASE_LOKI_URL: str = "http://localhost:3100"
+
     class Config:
         env_file = ".devbase-webapi.env"
         env_file_encoding = "utf-8"
diff --git a/apps/devops/app/common/models/deployment/deployment.py b/apps/devops/app/common/models/deployment/deployment.py
index 2bcbdda..4d9a9e1 100644
--- a/apps/devops/app/common/models/deployment/deployment.py
+++ b/apps/devops/app/common/models/deployment/deployment.py
@@ -1,5 +1,5 @@
-from datetime import datetime
-from typing import Literal
+from datetime import datetime, timedelta
+from typing import Literal, List
 
 from beanie import Document
 from bson import ObjectId
@@ -50,6 +50,27 @@ class CheckDeploymentStatusRequest(BaseModel):
     target_env: str
     user_id: str
 
+class CheckApplicationLogsRequest(BaseModel):
+    product_id: str
+    target_env: Literal["alpha", "prod"] = "alpha"
+    user_id: str = ''
+    log_level: List[Literal["info", "error", "debug"]] = Field(default_factory=lambda: ["info"])
+    start_time: datetime = datetime.now() - timedelta(minutes=5)
+    end_time: datetime = datetime.now()
+    limit: int = 1000
+
+class CheckApplicationLogsResponse(BaseModel):
+    product_id: str
+    target_env: Literal["alpha", "prod"]
+    user_id: str = ''
+    log_level: List[Literal["info", "error", "debug"]]
+    start_time: datetime
+    end_time: datetime
+    limit: int
+    logs: list[str]
+
+
+
 
 
 
diff --git a/apps/devops/app/routes/deployment/apis.py b/apps/devops/app/routes/deployment/apis.py
index b1b098e..d514127 100644
--- a/apps/devops/app/routes/deployment/apis.py
+++ b/apps/devops/app/routes/deployment/apis.py
@@ -5,7 +5,8 @@ from fastapi import APIRouter, Depends
 from loguru import logger
 
 from app.common.models import CodeDepotDoc
-from app.common.models.deployment.deployment import Deployment, InitDeploymentRequest
+from app.common.models.deployment.deployment import Deployment, InitDeploymentRequest, CheckDeploymentStatusRequest, \
+    CheckApplicationLogsRequest, CheckApplicationLogsResponse
 from app.routes.deployment.service import DeploymentService, get_deployment_service
 
 router = APIRouter(prefix="/deployment")
@@ -57,3 +58,19 @@ async def create_dummy_code_depot(
     except Exception as e:
         logger.error(f"Failed to create dummy code depot: {e}")
         raise e
+
+@router.post("/checkApplicationLogs")
+async def check_application_logs(
+        request: CheckApplicationLogsRequest,
+        service: DeploymentService = Depends(get_deployment_service)
+) -> CheckApplicationLogsResponse:
+    """
+    Check application logs for a given deployment.
+    """
+    try:
+        res = await service.check_application_logs(request)
+        return res
+    except Exception as e:
+        logger.error(f"Failed to check application logs: {e}")
+        raise e
+
diff --git a/apps/devops/app/routes/deployment/service.py b/apps/devops/app/routes/deployment/service.py
index 476718e..66e13f4 100644
--- a/apps/devops/app/routes/deployment/service.py
+++ b/apps/devops/app/routes/deployment/service.py
@@ -4,12 +4,14 @@ from datetime import datetime, timedelta
 from typing import List
 
 import httpx
+import requests
 from fastapi import HTTPException, Depends
 
 from app.common.config.site_settings import site_settings
 from app.common.models import Deployment
 from app.common.models.code_depot.code_depot import CodeDepotDoc, DepotStatus
-from app.common.models.deployment.deployment import InitDeploymentRequest
+from app.common.models.deployment.deployment import InitDeploymentRequest, CheckApplicationLogsRequest, \
+    CheckApplicationLogsResponse
 
 
 class DeploymentService:
@@ -157,6 +159,53 @@ class DeploymentService:
         #         raise HTTPException(status_code=response.status_code, detail=response.text)
         return True
 
+    async def check_application_logs(
+            self,
+            request: CheckApplicationLogsRequest,
+            loki_url: str = site_settings.BASE_LOKI_URL,
+    ) -> CheckApplicationLogsResponse:
+        # Convert to nanoseconds since epoch
+        start_ns = int(request.start_time.timestamp() * 1e9)
+        end_ns = int(request.end_time.timestamp() * 1e9)
+
+        # TODO: convert product_id to application name if needed
+        base_query = f'{{application="{request.product_id}", environment="{request.target_env}"}}'
+        log_level = '|'.join(request.log_level) if request.log_level else ''
+        loki_query = f'{base_query} |~ "{log_level}"'
+
+        params = {
+            "query": loki_query,
+            "limit": request.limit,
+            "start": start_ns,
+            "end": end_ns,
+        }
+
+        url = f"{loki_url}/loki/api/v1/query_range"
+        response = requests.get(url, params=params)
+
+        if response.status_code != 200:
+            raise Exception(f"Query failed: {response.status_code} - {response.text}")
+
+        data = response.json()
+        streams = data.get("data", {}).get("result", [])
+
+        logs = []
+        for stream in streams:
+            for ts, log in stream.get("values", []):
+                timestamp = datetime.fromtimestamp(int(ts) / 1e9)
+                logs.append(f"[{timestamp}] {log.strip()}")
+
+        return CheckApplicationLogsResponse(
+            product_id=request.product_id,
+            target_env=request.target_env,
+            user_id=request.user_id,
+            log_level=request.log_level,
+            start_time=request.start_time,
+            end_time=request.end_time,
+            limit=request.limit,
+            logs=logs
+        )
+
 # TODO: dummy test code, remove later
     async def create_dummy_code_depot(
             self,
diff --git a/apps/devops/requirements.txt b/apps/devops/requirements.txt
index 056543d..c593732 100644
--- a/apps/devops/requirements.txt
+++ b/apps/devops/requirements.txt
@@ -7,4 +7,8 @@ pydantic_settings==2.9.1
 pytest==7.1.2
 starlette==0.46.2
 uvicorn==0.34.2
-httpx==0.24.0
\ No newline at end of file
+httpx==0.24.0
+pydantic-settings~=2.9.1
+pymongo~=4.12.1
+pydantic~=2.11.4
+requests~=2.32.3
\ No newline at end of file