diff --git a/scripts/gateway-outbound-nonblocking-probe.mjs b/scripts/gateway-outbound-nonblocking-probe.mjs
index 2340d665..2beb513d 100644
--- a/scripts/gateway-outbound-nonblocking-probe.mjs
+++ b/scripts/gateway-outbound-nonblocking-probe.mjs
@@ -78,7 +78,7 @@ async function postRpc({ id, traceId, command }) {
       accept: "application/json",
       "content-type": "application/json"
     },
-    body: JSON.stringify({
+    body: {
       jsonrpc: "2.0",
       id,
       method: "hardware.invoke.shell",
@@ -99,7 +99,7 @@ async function postRpc({ id, traceId, command }) {
         serviceId: "hwlab-cloud-api",
         environment: "dev"
       }
-    })
+    }
   });
 }
 
@@ -107,7 +107,7 @@ function requestJson(url, { method, headers = {}, body }) {
   return new Promise((resolve, reject) => {
     const target = new URL(url);
     const client = target.protocol === "https:" ? https : http;
-    const payload = body ? JSON.stringify(body) : "";
+    const payload = body === undefined ? "" : JSON.stringify(body);
     const request = client.request(target, {
       method,
       headers: {