diff --git a/scripts/e2e/lib/openwebui/http-probe.mjs b/scripts/e2e/lib/openwebui/http-probe.mjs
index 8ea5e087b7cb..6a6af327f603 100644
--- a/scripts/e2e/lib/openwebui/http-probe.mjs
+++ b/scripts/e2e/lib/openwebui/http-probe.mjs
@@ -1,11 +1,7 @@
 // HTTP probe for OpenWebUI E2E scenarios.
+import { pathToFileURL } from "node:url";
 import { readPositiveIntEnv } from "../env-limits.mjs";
 
-const [url, expectedRaw = "200"] = process.argv.slice(2);
-if (!url) {
-  throw new Error("usage: http-probe.mjs <url> [status|lt500]");
-}
-
 function parseExpectedStatus(raw) {
   if (!/^[1-5]\d\d$/u.test(raw)) {
     throw new Error(`expected status must be lt500 or a decimal HTTP status. Got: ${raw}`);
@@ -13,20 +9,47 @@ function parseExpectedStatus(raw) {
   return Number(raw);
 }
 
-const timeoutMs = readPositiveIntEnv("OPENCLAW_HTTP_PROBE_TIMEOUT_MS", 30_000);
-const expectedStatus = expectedRaw === "lt500" ? undefined : parseExpectedStatus(expectedRaw);
-const controller = new AbortController();
-const timer = setTimeout(() => controller.abort(), timeoutMs);
-
-try {
-  const headers = {};
-  if (process.env.OPENCLAW_HTTP_PROBE_BEARER) {
-    headers.authorization = `Bearer ${process.env.OPENCLAW_HTTP_PROBE_BEARER}`;
+export async function probeHttpStatus({
+  url,
+  expectedRaw = "200",
+  timeoutMs = 30_000,
+  bearer = "",
+  fetchImpl = fetch,
+}) {
+  if (!url) {
+    throw new Error("usage: http-probe.mjs <url> [status|lt500]");
+  }
+  const expectedStatus = expectedRaw === "lt500" ? undefined : parseExpectedStatus(expectedRaw);
+  const controller = new AbortController();
+  const timer = setTimeout(() => controller.abort(), timeoutMs);
+  let res;
+  const headers = {};
+  if (bearer) {
+    headers.authorization = `Bearer ${bearer}`;
+  }
+
+  try {
+    res = await fetchImpl(url, { headers, signal: controller.signal }).catch(() => null);
+    return expectedRaw === "lt500"
+      ? Boolean(res && res.status < 500)
+      : res?.status === expectedStatus;
+  } finally {
+    clearTimeout(timer);
+    await res?.body?.cancel?.().catch(() => undefined);
   }
-  const res = await fetch(url, { headers, signal: controller.signal }).catch(() => null);
-  const ok =
-    expectedRaw === "lt500" ? Boolean(res && res.status < 500) : res?.status === expectedStatus;
-  process.exit(ok ? 0 : 1);
-} finally {
-  clearTimeout(timer);
+}
+
+async function main() {
+  const [url, expectedRaw = "200"] = process.argv.slice(2);
+  const ok = await probeHttpStatus({
+    url,
+    expectedRaw,
+    timeoutMs: readPositiveIntEnv("OPENCLAW_HTTP_PROBE_TIMEOUT_MS", 30_000),
+    bearer: process.env.OPENCLAW_HTTP_PROBE_BEARER,
+  });
+  process.exit(ok ? 0 : 1);
+}
+
+if (process.argv[1] && import.meta.url === pathToFileURL(process.argv[1]).href) {
+  await main();
 }
diff --git a/test/scripts/e2e-helper-env-limits.test.ts b/test/scripts/e2e-helper-env-limits.test.ts
index 7093331c38b5..a1ee39b19890 100644
--- a/test/scripts/e2e-helper-env-limits.test.ts
+++ b/test/scripts/e2e-helper-env-limits.test.ts
@@ -210,4 +210,30 @@ describe("e2e helper numeric env limits", () => {
       server.close();
     }
   });
+
+  it("cancels Open WebUI HTTP probe response bodies", async () => {
+    const { probeHttpStatus } = await import("../../scripts/e2e/lib/openwebui/http-probe.mjs");
+    let canceled = false;
+    const fetchImpl = (async (_url: string, init: RequestInit) => {
+      expect(init.headers).toEqual({ authorization: "Bearer token-123" });
+      return new Response(
+        new ReadableStream<Uint8Array>({
+          cancel() {
+            canceled = true;
+          },
+        }),
+        { status: 200 },
+      );
+    }) as typeof fetch;
+
+    await expect(
+      probeHttpStatus({
+        bearer: "token-123",
+        fetchImpl,
+        timeoutMs: 500,
+        url: "http://127.0.0.1/probe",
+      }),
+    ).resolves.toBe(true);
+    expect(canceled).toBe(true);
+  });
 });