diff --git a/server/plugins/validate-env.js b/server/plugins/validate-env.js
index 886ae6e..9f4b363 100644
--- a/server/plugins/validate-env.js
+++ b/server/plugins/validate-env.js
@@ -1,9 +1,24 @@
 export default defineNitroPlugin(() => {
-  const config = useRuntimeConfig()
+  const required = [
+    'MONGODB_URI',
+    'JWT_SECRET',
+    'RESEND_API_KEY',
+    'HELCIM_API_TOKEN',
+    'NUXT_PUBLIC_HELCIM_TOKEN',
+  ]
 
-  if (!config.jwtSecret) {
-    console.error('FATAL: JWT_SECRET environment variable is not set. Server cannot start without it.')
-    console.error('Set JWT_SECRET in your .env file or environment variables.')
+  const missing = required.filter((key) => {
+    // Check both process.env and runtime config where applicable
+    if (key === 'JWT_SECRET') {
+      const config = useRuntimeConfig()
+      return !config.jwtSecret
+    }
+    return !process.env[key]
+  })
+
+  if (missing.length > 0) {
+    console.error(`FATAL: Missing required environment variables: ${missing.join(', ')}`)
+    console.error('Set these in your .env file or environment variables.')
     process.exit(1)
   }
 })