diff --git a/util.go b/util.go
index c424759..1715458 100644
--- a/util.go
+++ b/util.go
@@ -2,6 +2,7 @@
 
 import (
 	"fmt"
+	"strings"
 	"time"
 )
 
@@ -20,3 +21,11 @@
 	}
 	return fmt.Errorf("Time out in WaitFor.")
 }
+
+// NormalizeURL ensures that each endpoint URL has a closing `/`, as expected by ServiceClient.
+func NormalizeURL(url string) string {
+	if !strings.HasSuffix(url, "/") {
+		return url + "/"
+	}
+	return url
+}