Update config.yaml

config.yaml

@@ -1,6 +1,3 @@
 mcp_servers:
-  web_search: http://localhost:3000
-  pubmed:   http://localhost:3001
-  chroma:   http://localhost:3002
-  python_run: http://localhost:3003
-db_url: sqlite:///embeddings.db
+  web_search: https://3d0b-2601-2c1-8800-34d0-45bf-4d03-a5eb-7856.ngrok-free.app
+db_url: sqlite:///embeddings.db