diff --git a/src/api/views.py b/src/api/views.py
index 700a8b1d5..068844919 100644
--- a/src/api/views.py
+++ b/src/api/views.py
@@ -32,7 +32,9 @@ DOMAIN_API_MESSAGES = {
         "Read more about choosing your .gov domain.</a>".format(public_site_url("domains/choosing"))
     ),
     "invalid": "Enter a domain using only letters, numbers, or hyphens (though we don't recommend using hyphens).",
-    "success": "That domain is available!",
+    "success": "That domain is available! We’ll try to give you the domain you want, \
+               but it's not guaranteed. After you complete this form, we’ll \
+               evaluate whether your request meets our requirements.",
     "error": GenericError.get_error_message(GenericErrorCodes.CANNOT_CONTACT_REGISTRY),
 }