diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1415ba7dcfb..1683cd75f12 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -92,6 +92,7 @@ Docs: https://docs.openclaw.ai
 - Tavily: report malformed search and extract API JSON with provider-owned errors instead of leaking raw parser failures.
 - Perplexity: report malformed Search API and chat completion JSON with provider-owned errors instead of leaking raw parser failures.
 - Exa: report malformed search API JSON with a provider-owned error instead of leaking raw parser failures.
+- Memory host SDK: report malformed remote JSON with caller-scoped errors for POST and batch file upload responses instead of leaking raw parser failures.
 - Twilio voice-call: report malformed successful API JSON responses with provider-owned errors instead of leaking raw parser failures.
 - Voice-call provider APIs: report malformed successful guarded JSON responses with provider-prefixed errors instead of leaking raw parser failures.
 - Realtime transcription: report malformed provider websocket JSON frames with owned parser errors instead of leaking raw `SyntaxError` objects.
diff --git a/packages/memory-host-sdk/src/host/batch-upload.test.ts b/packages/memory-host-sdk/src/host/batch-upload.test.ts
new file mode 100644
index 00000000000..1074e63e769
--- /dev/null
+++ b/packages/memory-host-sdk/src/host/batch-upload.test.ts
@@ -0,0 +1,41 @@
+import { beforeEach, describe, expect, it, vi } from "vitest";
+import { uploadBatchJsonlFile } from "./batch-upload.js";
+import { withRemoteHttpResponse } from "./remote-http.js";
+
+vi.mock("./remote-http.js", () => ({
+  withRemoteHttpResponse: vi.fn(),
+}));
+
+const remoteHttpMock = vi.mocked(withRemoteHttpResponse);
+
+function textResponse(body: string, status: number): Response {
+  return {
+    ok: status >= 200 && status < 300,
+    status,
+    json: async () => JSON.parse(body) as unknown,
+    text: async () => body,
+  } as Response;
+}
+
+describe("uploadBatchJsonlFile", () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  it("wraps malformed file-upload JSON with the request error prefix", async () => {
+    remoteHttpMock.mockImplementationOnce(async (params) => {
+      return await params.onResponse(textResponse("{ nope", 200));
+    });
+
+    await expect(
+      uploadBatchJsonlFile({
+        client: {
+          baseUrl: "https://memory.example/v1",
+          headers: { Authorization: "Bearer test" },
+        },
+        requests: [{ input: "one" }],
+        errorPrefix: "file upload failed",
+      }),
+    ).rejects.toThrow("file upload failed: malformed JSON response");
+  });
+});
diff --git a/packages/memory-host-sdk/src/host/batch-upload.ts b/packages/memory-host-sdk/src/host/batch-upload.ts
index 9b5b91531df..e7fcc6eb272 100644
--- a/packages/memory-host-sdk/src/host/batch-upload.ts
+++ b/packages/memory-host-sdk/src/host/batch-upload.ts
@@ -34,7 +34,11 @@ export async function uploadBatchJsonlFile(params: {
         const text = await fileRes.text();
         throw new Error(`${params.errorPrefix}: ${fileRes.status} ${text}`);
       }
-      return (await fileRes.json()) as { id?: string };
+      try {
+        return (await fileRes.json()) as { id?: string };
+      } catch (cause) {
+        throw new Error(`${params.errorPrefix}: malformed JSON response`, { cause });
+      }
     },
   });
   if (!filePayload.id) {
diff --git a/packages/memory-host-sdk/src/host/post-json.test.ts b/packages/memory-host-sdk/src/host/post-json.test.ts
index 2a9dd233202..599ffa4c151 100644
--- a/packages/memory-host-sdk/src/host/post-json.test.ts
+++ b/packages/memory-host-sdk/src/host/post-json.test.ts
@@ -70,4 +70,20 @@ describe("postJson", () => {
     expect((error as Error).message).toBe("post failed: 502 bad gateway");
     expect((error as { status?: unknown }).status).toBe(502);
   });
+
+  it("wraps malformed success JSON with the request error prefix", async () => {
+    remoteHttpMock.mockImplementationOnce(async (params) => {
+      return await params.onResponse(textResponse("{ nope", 200));
+    });
+
+    await expect(
+      postJson({
+        url: "https://memory.example/v1/post",
+        headers: {},
+        body: {},
+        errorPrefix: "post failed",
+        parse: () => ({}),
+      }),
+    ).rejects.toThrow("post failed: malformed JSON response");
+  });
 });
diff --git a/packages/memory-host-sdk/src/host/post-json.ts b/packages/memory-host-sdk/src/host/post-json.ts
index 1e71eec4920..471e8bce1a7 100644
--- a/packages/memory-host-sdk/src/host/post-json.ts
+++ b/packages/memory-host-sdk/src/host/post-json.ts
@@ -31,7 +31,15 @@ export async function postJson<T>(params: {
         }
         throw err;
       }
-      return await params.parse(await res.json());
+      return await params.parse(await readJsonResponse(res, params.errorPrefix));
     },
   });
 }
+
+async function readJsonResponse(res: Response, errorPrefix: string): Promise<unknown> {
+  try {
+    return await res.json();
+  } catch (cause) {
+    throw new Error(`${errorPrefix}: malformed JSON response`, { cause });
+  }
+}