diff --git a/apps/edge-api/src/edge_api/routers/serve.py b/apps/edge-api/src/edge_api/routers/serve.py
index 214dc2b0..2511273f 100644
--- a/apps/edge-api/src/edge_api/routers/serve.py
+++ b/apps/edge-api/src/edge_api/routers/serve.py
@@ -1,35 +1,63 @@
 """Edge serve operations router for Edge API Service"""
 
-from fastapi import APIRouter
+from fastapi import APIRouter, Depends, HTTPException, Query
+from pydantic import BaseModel, Field
+
+from ..services.serve_service import ServeService
 
 router = APIRouter()
 
 
-@router.post("/start")
-async def start_serve():
-    """Start serving edge compute requests - TODO: Implement in Phase 5"""
-    return {"message": "Start serve endpoint - to be implemented in Phase 5"}
+class SubmitComputeRequest(BaseModel):
+    """Request model for submitting compute request"""
+    gpu_id: str
+    model_name: str
+    input_data: dict
+    priority: str = Field(default="normal")
 
 
-@router.post("/stop")
-async def stop_serve():
-    """Stop serving edge compute requests - TODO: Implement in Phase 5"""
-    return {"message": "Stop serve endpoint - to be implemented in Phase 5"}
+def get_serve_service() -> ServeService:
+    """Dependency injection for serve service"""
+    return ServeService()
 
 
-@router.get("/status")
-async def get_serve_status():
-    """Get serve status - TODO: Implement in Phase 5"""
-    return {"message": "Get serve status endpoint - to be implemented in Phase 5"}
+@router.post("/requests")
+async def submit_compute_request(request: SubmitComputeRequest, svc: ServeService = Depends(get_serve_service)):
+    """Submit compute request"""
+    result = await svc.submit_compute_request(request.gpu_id, request.model_name, request.input_data, request.priority)
+    return result
 
 
 @router.get("/requests")
-async def get_pending_requests():
-    """Get pending compute requests - TODO: Implement in Phase 5"""
-    return {"message": "Get pending requests endpoint - to be implemented in Phase 5"}
+async def list_compute_requests(gpu_id: str = Query(None), status: str = Query(None), svc: ServeService = Depends(get_serve_service)):
+    """List compute requests, optionally filtered"""
+    requests = await svc.list_compute_requests(gpu_id, status)
+    return {"requests": requests, "total": len(requests)}
 
 
-@router.post("/requests/{request_id}/complete")
-async def complete_request(request_id: str):
-    """Complete a compute request - TODO: Implement in Phase 5"""
-    return {"message": f"Complete request {request_id} - to be implemented in Phase 5"}
+@router.get("/requests/{request_id}")
+async def get_compute_request(request_id: str, svc: ServeService = Depends(get_serve_service)):
+    """Get compute request details"""
+    req = await svc.get_compute_request(request_id)
+    if req is None:
+        raise HTTPException(status_code=404, detail=f"Request {request_id} not found")
+    return req
+
+
+@router.post("/requests/{request_id}/cancel")
+async def cancel_compute_request(request_id: str, svc: ServeService = Depends(get_serve_service)):
+    """Cancel compute request"""
+    success = await svc.cancel_compute_request(request_id)
+    if success:
+        return {"message": f"Request {request_id} cancelled"}
+    else:
+        raise HTTPException(status_code=400, detail=f"Request {request_id} cannot be cancelled")
+
+
+@router.get("/requests/{request_id}/result")
+async def get_compute_result(request_id: str, svc: ServeService = Depends(get_serve_service)):
+    """Get compute result"""
+    result = await svc.get_compute_result(request_id)
+    if result is None:
+        raise HTTPException(status_code=404, detail=f"Result for request {request_id} not found")
+    return result
diff --git a/apps/edge-api/src/edge_api/schemas/serve.py b/apps/edge-api/src/edge_api/schemas/serve.py
index 52e0a9a1..014bf2e3 100644
--- a/apps/edge-api/src/edge_api/schemas/serve.py
+++ b/apps/edge-api/src/edge_api/schemas/serve.py
@@ -1,6 +1,6 @@
 """Edge serve-related schemas for Edge API Service"""
 
-from datetime import datetime, timezone
+from datetime import datetime
 from uuid import uuid4
 
 from sqlalchemy import JSON, Column
@@ -15,24 +15,17 @@ class ComputeRequest(SQLModel, table=True):
     
     id: str = Field(default_factory=lambda: f"compute_req_{uuid4().hex[:8]}", primary_key=True)
     request_id: str = Field(index=True)
-    island_id: str = Field(index=True)
-    gpu_type: str
-    status: str = Field(default="pending", index=True)  # pending, processing, completed, failed
-    created_at: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))
-    updated_at: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))
-    
-    # Request parameters
+    gpu_id: str = Field(index=True)
     model_name: str
     input_data: dict = Field(default_factory=dict, sa_column=Column(JSON, nullable=True))
-    
-    # Processing info
-    assigned_gpu_id: str | None = Field(default=None)
+    priority: str = Field(default="normal")
+    status: str = Field(default="queued", index=True)  # queued, running, completed, failed, cancelled
+    created_at: datetime = Field(default_factory=datetime.utcnow)
+    updated_at: datetime = Field(default_factory=datetime.utcnow)
     started_at: datetime | None = Field(default=None)
     completed_at: datetime | None = Field(default=None)
-    
-    # Result
-    result: dict | None = Field(default=None, sa_column=Column(JSON, nullable=True))
     error: str | None = Field(default=None)
+    extra_data: dict = Field(default_factory=dict, sa_column=Column(JSON, nullable=True))
 
 
 class ComputeResult(SQLModel, table=True):
@@ -48,5 +41,5 @@ class ComputeResult(SQLModel, table=True):
     gpu_id: str
     result: dict = Field(default_factory=dict, sa_column=Column(JSON, nullable=False))
     cache_ttl: int = Field(default=3600)  # 1 hour default
-    created_at: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))
-    expires_at: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))
+    created_at: datetime = Field(default_factory=datetime.utcnow)
+    expires_at: datetime = Field(default_factory=datetime.utcnow)
diff --git a/apps/edge-api/src/edge_api/services/serve_service.py b/apps/edge-api/src/edge_api/services/serve_service.py
index c8e8ac04..2255a06e 100644
--- a/apps/edge-api/src/edge_api/services/serve_service.py
+++ b/apps/edge-api/src/edge_api/services/serve_service.py
@@ -1,33 +1,114 @@
 """Edge serve service for Edge API Service"""
 
-from typing import Dict, List
+from typing import Dict, Optional, List
+from datetime import datetime
+from uuid import uuid4
 
+from ..storage import get_session
 from ..schemas.serve import ComputeRequest, ComputeResult
+from sqlmodel import select, delete
 
 
 class ServeService:
     """Service for edge serve operations"""
     
-    def __init__(self):
-        # TODO: Initialize serve queue in Phase 5
-        pass
+    async def submit_compute_request(self, gpu_id: str, model_name: str, input_data: dict, priority: str = "normal") -> Dict:
+        """Submit compute request"""
+        async with get_session() as session:
+            request_id = f"req_{uuid4().hex[:8]}"
+            
+            request = ComputeRequest(
+                request_id=request_id,
+                gpu_id=gpu_id,
+                model_name=model_name,
+                input_data=input_data,
+                priority=priority,
+                status="queued"
+            )
+            session.add(request)
+            await session.commit()
+            
+            return {
+                "success": True,
+                "request_id": request_id,
+                "status": "queued",
+                "message": f"Compute request {request_id} submitted"
+            }
     
-    async def start_serve(self, island_id: str) -> Dict:
-        """Start serving edge compute requests - TODO: Implement in Phase 5"""
-        return {"message": "start_serve - to be implemented in Phase 5"}
+    async def get_compute_request(self, request_id: str) -> Optional[Dict]:
+        """Get compute request details"""
+        async with get_session() as session:
+            result = await session.execute(select(ComputeRequest).where(ComputeRequest.request_id == request_id))
+            req = result.scalar_one_or_none()
+            
+            if req:
+                return {
+                    "request_id": req.request_id,
+                    "gpu_id": req.gpu_id,
+                    "model_name": req.model_name,
+                    "input_data": req.input_data,
+                    "priority": req.priority,
+                    "status": req.status,
+                    "created_at": req.created_at.isoformat() if req.created_at else None,
+                    "started_at": req.started_at.isoformat() if req.started_at else None,
+                    "completed_at": req.completed_at.isoformat() if req.completed_at else None,
+                    "error": req.error,
+                    "extra_data": req.extra_data
+                }
+            return None
     
-    async def stop_serve(self, island_id: str) -> Dict:
-        """Stop serving edge compute requests - TODO: Implement in Phase 5"""
-        return {"message": "stop_serve - to be implemented in Phase 5"}
+    async def cancel_compute_request(self, request_id: str) -> bool:
+        """Cancel compute request"""
+        async with get_session() as session:
+            result = await session.execute(select(ComputeRequest).where(ComputeRequest.request_id == request_id))
+            req = result.scalar_one_or_none()
+            
+            if req and req.status in ["queued", "running"]:
+                req.status = "cancelled"
+                req.completed_at = datetime.utcnow()
+                await session.commit()
+                return True
+            return False
     
-    async def get_serve_status(self, island_id: str) -> Dict:
-        """Get serve status - TODO: Implement in Phase 5"""
-        return {"message": "get_serve_status - to be implemented in Phase 5"}
+    async def list_compute_requests(self, gpu_id: str = None, status: str = None) -> List[Dict]:
+        """List compute requests, optionally filtered"""
+        async with get_session() as session:
+            query = select(ComputeRequest)
+            
+            if gpu_id:
+                query = query.where(ComputeRequest.gpu_id == gpu_id)
+            if status:
+                query = query.where(ComputeRequest.status == status)
+            
+            result = await session.execute(query)
+            requests = result.scalars().all()
+            
+            return [
+                {
+                    "request_id": req.request_id,
+                    "gpu_id": req.gpu_id,
+                    "model_name": req.model_name,
+                    "priority": req.priority,
+                    "status": req.status,
+                    "created_at": req.created_at.isoformat() if req.created_at else None
+                }
+                for req in requests
+            ]
     
-    async def get_pending_requests(self, island_id: str) -> List[Dict]:
-        """Get pending compute requests - TODO: Implement in Phase 5"""
-        return [{"message": "get_pending_requests - to be implemented in Phase 5"}]
-    
-    async def complete_request(self, request_id: str, result: Dict) -> Dict:
-        """Complete a compute request - TODO: Implement in Phase 5"""
-        return {"message": f"complete_request {request_id} - to be implemented in Phase 5"}
+    async def get_compute_result(self, request_id: str) -> Optional[Dict]:
+        """Get compute result"""
+        async with get_session() as session:
+            result = await session.execute(select(ComputeResult).where(ComputeResult.request_id == request_id))
+            res = result.scalar_one_or_none()
+            
+            if res:
+                return {
+                    "result_id": res.result_id,
+                    "request_id": res.request_id,
+                    "output_data": res.output_data,
+                    "metrics": res.metrics,
+                    "status": res.status,
+                    "created_at": res.created_at.isoformat() if res.created_at else None,
+                    "extra_data": res.extra_data
+                }
+            return None