diff --git a/client/src/api/mod.rs b/client/src/api/mod.rs
index 279e3e5..a8c17eb 100644
--- a/client/src/api/mod.rs
+++ b/client/src/api/mod.rs
@@ -62,6 +62,12 @@ impl ApiClient {
         })
     }
 
+    /// Sets the API endpoint of this client.
+    pub fn set_endpoint(&mut self, endpoint: &str) -> Result<()> {
+        self.endpoint = Url::parse(endpoint)?;
+        Ok(())
+    }
+
     /// Returns the configuration of a cache.
     pub async fn get_cache_config(&self, cache: &CacheName) -> Result<CacheConfig> {
         let endpoint = self
diff --git a/client/src/command/push.rs b/client/src/command/push.rs
index 07e504c..a38482a 100644
--- a/client/src/command/push.rs
+++ b/client/src/command/push.rs
@@ -194,10 +194,10 @@ pub async fn run(opts: Opts) -> Result<()> {
 
     let (server_name, server, cache) = config.resolve_cache(&sub.cache)?;
 
-    let api = ApiClient::from_server_config(server.clone())?;
+    let mut api = ApiClient::from_server_config(server.clone())?;
     let plan = PushPlan::plan(
         store.clone(),
-        &api,
+        &mut api,
         cache,
         roots,
         sub.no_closure,
@@ -261,7 +261,7 @@ impl PushPlan {
     /// Creates a plan.
     async fn plan(
         store: Arc<NixStore>,
-        api: &ApiClient,
+        api: &mut ApiClient,
         cache: &CacheName,
         roots: Vec<StorePath>,
         no_closure: bool,
@@ -307,6 +307,11 @@ impl PushPlan {
         // Confirm remote cache validity, query cache config
         let cache_config = api.get_cache_config(cache).await?;
 
+        if let Some(api_endpoint) = &cache_config.api_endpoint {
+            // Use delegated API endpoint
+            api.set_endpoint(api_endpoint)?;
+        }
+
         if !ignore_upstream_filter {
             // Filter out paths signed by upstream caches
             let upstream_cache_key_names =