diff --git a/main.py b/main.py
index edd4550..c9ced19 100644
--- a/main.py
+++ b/main.py
@@ -20,6 +20,8 @@ prjs = []
 inpDir = "C:/inpfiles/"
 tmpDir = "C:/tmpfiles/"
 
+lockedPrjs = {}
+
 if not os.path.exists(inpDir):
     os.mkdir(inpDir)
 
@@ -66,6 +68,20 @@ async def fastapi_copy_project(source: str, target: str):
     copy_project(source, target)
     return True
 
+@app.get("/isprojectlocked/")
+async def fastapi_is_locked(network: str):
+    return str in lockedPrjs
+
+@app.post("/lockproject/")
+async def fastapi_lock_project(network: str, id: str):
+    lockedPrjs[str] = id
+    return True
+
+@app.post("/unlockproject/")
+async def fastapi_unlock_project(network: str):
+    del lockedPrjs[str]
+    return True
+
 # undo/redo
 @app.post("/undo/")
 async def fastapi_undo(network: str):