diff --git a/extensions/pixverse/video-generation-provider.test.ts b/extensions/pixverse/video-generation-provider.test.ts
index 2525094ab573..0873d4307a39 100644
--- a/extensions/pixverse/video-generation-provider.test.ts
+++ b/extensions/pixverse/video-generation-provider.test.ts
@@ -182,6 +182,48 @@ describe("pixverse video generation provider", () => {
     expect(firstPostJsonRequest().body).not.toHaveProperty("seed");
   });
 
+  it("drops malformed response seed metadata", async () => {
+    postJsonRequestMock.mockResolvedValue({
+      response: {
+        json: async () => ({
+          ErrCode: 0,
+          ErrMsg: "success",
+          Resp: { video_id: 123 },
+        }),
+      },
+      release: vi.fn(async () => {}),
+    });
+    fetchWithTimeoutMock.mockResolvedValueOnce({
+      json: async () => ({
+        ErrCode: 0,
+        ErrMsg: "success",
+        Resp: {
+          id: 123,
+          status: 1,
+          url: "https://media.pixverse.ai/out.mp4",
+          seed: 1.5,
+        },
+      }),
+      headers: new Headers(),
+    });
+
+    const provider = buildPixVerseVideoGenerationProvider();
+    const result = await provider.generateVideo({
+      provider: "pixverse",
+      model: "pixverse/v6",
+      prompt: "a quiet city street at sunrise",
+      cfg: {},
+    });
+
+    expect(result.metadata).toEqual({
+      endpoint: "/video/text/generate",
+      videoId: 123,
+      status: 1,
+      seed: undefined,
+      size: undefined,
+    });
+  });
+
   it("uploads local image input before submitting image-to-video", async () => {
     postMultipartRequestMock.mockResolvedValue({
       response: {
diff --git a/extensions/pixverse/video-generation-provider.ts b/extensions/pixverse/video-generation-provider.ts
index 4352d2af004b..6c03a4dcf4b1 100644
--- a/extensions/pixverse/video-generation-provider.ts
+++ b/extensions/pixverse/video-generation-provider.ts
@@ -13,7 +13,11 @@ import {
   sanitizeConfiguredModelProviderRequest,
   type ProviderOperationDeadline,
 } from "openclaw/plugin-sdk/provider-http";
-import { asFiniteNumber, normalizeOptionalString } from "openclaw/plugin-sdk/string-coerce-runtime";
+import {
+  asFiniteNumber,
+  asSafeIntegerInRange,
+  normalizeOptionalString,
+} from "openclaw/plugin-sdk/string-coerce-runtime";
 import type {
   GeneratedVideoAsset,
   VideoGenerationProvider,
@@ -34,6 +38,7 @@ const DEFAULT_TIMEOUT_MS = 300_000;
 const POLL_INTERVAL_MS = 5_000;
 const MAX_POLL_ATTEMPTS = 180;
 const MAX_DURATION_SECONDS = 15;
+const PIXVERSE_SEED_MAX = 2_147_483_647;
 const PIXVERSE_VIDEO_MODELS = ["v6", "c1"] as const;
 const PIXVERSE_TEXT_ASPECT_RATIOS = [
   "16:9",
@@ -134,12 +139,16 @@ function appendOptionalNumber(body: Record<string, unknown>, key: string, value:
 }
 
 function appendOptionalInt32Seed(body: Record<string, unknown>, value: unknown): void {
-  const seed = asFiniteNumber(value);
-  if (seed != null && Number.isSafeInteger(seed) && seed >= 0 && seed <= 2_147_483_647) {
+  const seed = asSafeIntegerInRange(value, { min: 0, max: PIXVERSE_SEED_MAX });
+  if (seed !== undefined) {
     body.seed = seed;
   }
 }
 
+function readPixVerseSeed(value: unknown): number | undefined {
+  return asSafeIntegerInRange(value, { min: 0, max: PIXVERSE_SEED_MAX });
+}
+
 function appendOptionalString(body: Record<string, unknown>, key: string, value: unknown): void {
   const stringValue = normalizeOptionalString(value);
   if (stringValue) {
@@ -498,7 +507,7 @@ export function buildPixVerseVideoGenerationProvider(): VideoGenerationProvider
             endpoint,
             videoId,
             status: readPixVerseStatus(completed),
-            seed: asFiniteNumber(completed.seed),
+            seed: readPixVerseSeed(completed.seed),
             size: asFiniteNumber(completed.size),
           },
         };