diff --git a/src/modules/qqbot/plugin-platform/infrastructure/integration/runtime/plugin-host-bridge.service.ts b/src/modules/qqbot/plugin-platform/infrastructure/integration/runtime/plugin-host-bridge.service.ts
index ead18a5..1ed5318 100644
--- a/src/modules/qqbot/plugin-platform/infrastructure/integration/runtime/plugin-host-bridge.service.ts
+++ b/src/modules/qqbot/plugin-platform/infrastructure/integration/runtime/plugin-host-bridge.service.ts
@@ -361,7 +361,7 @@ function getHttpRequestOptions(
 function getRedirectRequestOptions(
   args: Record<string, unknown>,
 ): QqbotPluginResolveRedirectRequest {
-  const candidate = args.input || args.options || args;
+  const candidate = args.input ?? args.options ?? args;
   if (!isRecord(candidate)) {
     throw new Error('Plugin host redirect options must be an object');
   }
diff --git a/src/modules/qqbot/plugin-platform/infrastructure/integration/sdk/plugin-http-client.service.ts b/src/modules/qqbot/plugin-platform/infrastructure/integration/sdk/plugin-http-client.service.ts
index 0a3c4a1..c72b462 100644
--- a/src/modules/qqbot/plugin-platform/infrastructure/integration/sdk/plugin-http-client.service.ts
+++ b/src/modules/qqbot/plugin-platform/infrastructure/integration/sdk/plugin-http-client.service.ts
@@ -16,6 +16,7 @@ export type QqbotPluginHttpClientRequest = {
 
 export type QqbotPluginResolveRedirectRequest = {
   context?: string;
+  failureMessage?: (statusCode: number) => string;
   headers?: Record<string, string>;
   maxRedirects?: number;
   timeoutMessage?: string;
@@ -194,7 +195,7 @@ export class QqbotPluginHttpClientService {
    * Requests one URL and returns its redirect Location after the response body is drained.
    * @param url - Validated HTTP(S) URL to request.
    * @param input - Headers and timeout options shared across the redirect chain.
-   * @returns Redirect Location header when the response is 3xx, otherwise `undefined`.
+   * @returns Redirect Location header when the response is 3xx, otherwise `undefined`; rejects for HTTP error statuses.
    */
   private requestRedirectLocation(
     url: URL,
@@ -222,6 +223,16 @@ export class QqbotPluginHttpClientService {
 
           response.on('error', reject);
           response.on('end', () => {
+            if (statusCode >= 400) {
+              reject(
+                createPluginHttpError(
+                  input.failureMessage?.(statusCode) ||
+                    `${context}请求失败：${statusCode}`,
+                  statusCode,
+                ),
+              );
+              return;
+            }
             if (
               statusCode >= 300 &&
               statusCode < 400 &&
diff --git a/test/modules/qqbot/plugin-platform/plugin-host-bridge.spec.ts b/test/modules/qqbot/plugin-platform/plugin-host-bridge.spec.ts
index 6630d80..9d82e8c 100644
--- a/test/modules/qqbot/plugin-platform/plugin-host-bridge.spec.ts
+++ b/test/modules/qqbot/plugin-platform/plugin-host-bridge.spec.ts
@@ -132,11 +132,11 @@ describe('QQBot plugin host bridge', () => {
     const options = {
       maxRedirects: 3,
       timeoutMs: 1000,
-      url: 'https://b23.tv/abc123',
+      url: 'https://short.example/abc123',
     };
     httpClient.resolveRedirect.mockResolvedValue({
-      finalUrl: 'https://www.bilibili.com/video/BV1xx411c7mD',
-      redirects: ['https://www.bilibili.com/video/BV1xx411c7mD'],
+      finalUrl: 'https://target.example/video/123',
+      redirects: ['https://target.example/video/123'],
     });
 
     await expect(
@@ -148,8 +148,8 @@ describe('QQBot plugin host bridge', () => {
     ).resolves.toEqual({
       ok: true,
       value: {
-        finalUrl: 'https://www.bilibili.com/video/BV1xx411c7mD',
-        redirects: ['https://www.bilibili.com/video/BV1xx411c7mD'],
+        finalUrl: 'https://target.example/video/123',
+        redirects: ['https://target.example/video/123'],
       },
     });
     expect(httpClient.resolveRedirect).toHaveBeenCalledWith(options);
diff --git a/test/modules/qqbot/plugin-platform/plugin-http-client.spec.ts b/test/modules/qqbot/plugin-platform/plugin-http-client.spec.ts
index dbeb30b..b75f853 100644
--- a/test/modules/qqbot/plugin-platform/plugin-http-client.spec.ts
+++ b/test/modules/qqbot/plugin-platform/plugin-http-client.spec.ts
@@ -23,6 +23,11 @@ describe('QQBot plugin HTTP client redirect resolver', () => {
         response.end();
         return;
       }
+      if (request.url === '/missing') {
+        response.writeHead(404, { 'Content-Type': 'text/plain' });
+        response.end('missing');
+        return;
+      }
       response.writeHead(200, { 'Content-Type': 'text/plain' });
       response.end('ok');
     });
@@ -67,4 +72,13 @@ describe('QQBot plugin HTTP client redirect resolver', () => {
       }),
     ).rejects.toThrow('插件 HTTP 重定向仅支持 http/https');
   });
+
+  it('rejects HTTP error statuses while resolving redirects', async () => {
+    await expect(
+      new QqbotPluginHttpClientService().resolveRedirect({
+        timeoutMs: 1000,
+        url: `${baseUrl}/missing`,
+      }),
+    ).rejects.toMatchObject({ statusCode: 404 });
+  });
 });