diff --git a/system/helpers/nodeinfo.nix b/system/helpers/nodeinfo.nix
new file mode 100644
index 0000000..a54fe99
--- /dev/null
+++ b/system/helpers/nodeinfo.nix
@@ -0,0 +1,5 @@
+### Nodeinfo
+# Set this to add command `nodeinfo` to the system environment.
+# It shows info about running services like onion addresses and local addresses.
+# It is enabled by default when importing `secure-node.nix`.
+{ nix-bitcoin.nodeinfo.enable = true; }