diff --git a/provider.tf b/provider.tf
index 5e08ed6..48db9ed 100644
--- a/provider.tf
+++ b/provider.tf
@@ -7,6 +7,29 @@ terraform {
   }
 }
 
+variable "virtual_environment_endpoint" {
+  type        = string
+  description = "The endpoint for the Proxmox Virtual Environment API (example: https://host:port)"
+}
+
+variable "virtual_environment_password" {
+  type        = string
+  description = "The password for the Proxmox Virtual Environment API"
+  sensitive   = true
+}
+
+variable "virtual_environment_username" {
+  type        = string
+  description = "The username and realm for the Proxmox Virtual Environment API (example: root@pam)"
+  sensitive   = true
+}
+
+variable "netbird_token" {
+  type      = string
+  description = "Token used to join new VMs to netbird"
+  sensitive   = true
+}
+
 provider "proxmox" {
   endpoint = var.virtual_environment_endpoint
   username = var.virtual_environment_username