diff --git a/LibreNMS/Alert/Transport/Api.php b/LibreNMS/Alert/Transport/Api.php
index 178c95741e..5f1f100344 100644
--- a/LibreNMS/Alert/Transport/Api.php
+++ b/LibreNMS/Alert/Transport/Api.php
@@ -85,6 +85,10 @@ class Api extends Transport
             $res = $client->request('PUT', $host, $request_opts);
         } else { //Method POST
             $request_opts['form_params'] = $query;
+            foreach ($query as $metric => $value) { // replace all variables defined in Options and found in Body for their values
+                $body = str_replace('{{ $' . $metric . ' }}', $value, $body);
+            }
+            $request_opts['body'] = $body;
             $res = $client->request('POST', $host, $request_opts);
         }