diff --git a/lib/rest.js b/lib/rest.js
index cf4ca73..b5f752f 100644
--- a/lib/rest.js
+++ b/lib/rest.js
@@ -65,10 +65,12 @@ class RestClient {
 
   request(method, url, data, options = {}) {
     // Only apply proxy agents if custom agents are not explicitly provided
-    // Priority: explicit httpsAgent/httpAgent > proxy config > default
+    // Priority: explicit httpsAgent/httpAgent/agent > proxy config > default
     const hasCustomAgents =
       this.restClientConfig &&
-      ('httpsAgent' in this.restClientConfig || 'httpAgent' in this.restClientConfig);
+      ('httpsAgent' in this.restClientConfig ||
+        'httpAgent' in this.restClientConfig ||
+        'agent' in this.restClientConfig);
     const proxyAgents = hasCustomAgents ? {} : getProxyAgentForUrl(url, this.restClientConfig);
     const usingProxyAgent = Object.keys(proxyAgents).length > 0;