diff --git a/dd-trace-ot/src/main/java/datadog/trace/common/writer/ddagent/DDAgentApi.java b/dd-trace-ot/src/main/java/datadog/trace/common/writer/ddagent/DDAgentApi.java
index ab1ab439dd..47beacb9ca 100644
--- a/dd-trace-ot/src/main/java/datadog/trace/common/writer/ddagent/DDAgentApi.java
+++ b/dd-trace-ot/src/main/java/datadog/trace/common/writer/ddagent/DDAgentApi.java
@@ -291,12 +291,14 @@ public class DDAgentApi {
   }
 
   private synchronized void detectEndpoint() {
-    final HttpUrl v4Url = getUrl(host, port, TRACES_ENDPOINT_V4);
-    if (endpointAvailable(v4Url, unixDomainSocketPath, true)) {
-      tracesUrl = v4Url;
-    } else {
-      log.debug("API v0.4 endpoints not available. Downgrading to v0.3");
-      tracesUrl = getUrl(host, port, TRACES_ENDPOINT_V3);
+    if (tracesUrl == null) {
+      final HttpUrl v4Url = getUrl(host, port, TRACES_ENDPOINT_V4);
+      if (endpointAvailable(v4Url, unixDomainSocketPath, true)) {
+        tracesUrl = v4Url;
+      } else {
+        log.debug("API v0.4 endpoints not available. Downgrading to v0.3");
+        tracesUrl = getUrl(host, port, TRACES_ENDPOINT_V3);
+      }
     }
   }