diff --git a/backend/app/api/v1/dag.py b/backend/app/api/v1/dag.py
new file mode 100644
index 0000000..3641ffe
--- /dev/null
+++ b/backend/app/api/v1/dag.py
@@ -0,0 +1,27 @@
+"""DAG orchestration endpoints."""
+from fastapi import APIRouter, Depends
+from sqlalchemy.orm import Session
+from pydantic import BaseModel
+from typing import List
+from app.database import get_db
+from app.services.dag_service import DAGService
+from app.api.deps import get_current_user
+from app.models.user import User
+
+router = APIRouter(prefix="/dag")
+
+
+class DAGExecuteRequest(BaseModel):
+    project_id: int
+    task_ids: List[int]
+
+
+@router.post("/execute")
+def execute_dag(
+    req: DAGExecuteRequest,
+    user: User = Depends(get_current_user),
+    db: Session = Depends(get_db),
+):
+    """Execute multiple tasks respecting dependencies (DAG)."""
+    results = DAGService.execute_dag(db, user.tenant_id, req.project_id, req.task_ids)
+    return {"success": True, "results": results}