diff --git a/server/src/main.rs b/server/src/main.rs
index c9d2274..0b762e8 100644
--- a/server/src/main.rs
+++ b/server/src/main.rs
@@ -44,6 +44,9 @@ enum ServerMode {
 
     /// Run garbage collection then exit.
     GarbageCollectorOnce,
+
+    /// Check the configuration then exit.
+    CheckConfig,
 }
 
 #[tokio::main]
@@ -95,6 +98,9 @@ async fn main() -> Result<()> {
         ServerMode::GarbageCollectorOnce => {
             attic_server::gc::run_garbage_collection_once(config).await?;
         }
+        ServerMode::CheckConfig => {
+            // config is valid, let's just exit :)
+        }
     }
 
     Ok(())