diff --git a/packages/service/core/app/mcp.ts b/packages/service/core/app/mcp.ts
index 1c8ac736ea..24d3e4ffeb 100644
--- a/packages/service/core/app/mcp.ts
+++ b/packages/service/core/app/mcp.ts
@@ -10,9 +10,16 @@ import type { McpToolDataType } from '@fastgpt/global/core/app/tool/mcpTool/type
 import { UserError } from '@fastgpt/global/common/error/utils';
 import $RefParser from '@apidevtools/json-schema-ref-parser';
 import { getLogger, LogCategories } from '../../common/logger';
+import { isInternalAddress, PRIVATE_URL_TEXT } from '../../common/system/utils';
 
 const logger = getLogger(LogCategories.MODULE.APP.MCP_TOOLS);
 
+export const assertMCPUrlNotInternal = async (url: string) => {
+  if (await isInternalAddress(url)) {
+    return Promise.reject(PRIVATE_URL_TEXT);
+  }
+};
+
 export class MCPClient {
   private client: Client;
   private url: string;
diff --git a/packages/service/core/workflow/dispatch/ai/agent/sub/tool/index.ts b/packages/service/core/workflow/dispatch/ai/agent/sub/tool/index.ts
index b82e8ab55e..e966800697 100644
--- a/packages/service/core/workflow/dispatch/ai/agent/sub/tool/index.ts
+++ b/packages/service/core/workflow/dispatch/ai/agent/sub/tool/index.ts
@@ -16,7 +16,7 @@ import { NodeOutputKeyEnum } from '@fastgpt/global/core/workflow/constants';
 import { pushTrack } from '../../../../../../../common/middle/tracks/utils';
 import { getErrText } from '@fastgpt/global/common/error/utils';
 import { getAppVersionById } from '../../../../../../app/version/controller';
-import { MCPClient } from '../../../../../../app/mcp';
+import { assertMCPUrlNotInternal, MCPClient } from '../../../../../../app/mcp';
 import { runHTTPTool } from '../../../../../../app/http';
 import { getS3ChatSource } from '../../../../../../../common/s3/sources/chat';
 import { parseToolId } from '../../../../child/runTool';
@@ -197,6 +197,9 @@ export const dispatchTool = async ({
 
       const { headerSecret, url } =
         tool.nodes[0].toolConfig?.mcpToolSet ?? tool.nodes[0].inputs[0].value;
+
+      await assertMCPUrlNotInternal(url);
+
       const mcpClient = new MCPClient({
         url,
         headers: getSecretValue({
diff --git a/packages/service/core/workflow/dispatch/child/runTool.ts b/packages/service/core/workflow/dispatch/child/runTool.ts
index 53dcf0db92..dea584c1f3 100644
--- a/packages/service/core/workflow/dispatch/child/runTool.ts
+++ b/packages/service/core/workflow/dispatch/child/runTool.ts
@@ -7,7 +7,7 @@ import {
   type ModuleDispatchProps
 } from '@fastgpt/global/core/workflow/runtime/type';
 import { NodeInputKeyEnum } from '@fastgpt/global/core/workflow/constants';
-import { MCPClient } from '../../../app/mcp';
+import { assertMCPUrlNotInternal, MCPClient } from '../../../app/mcp';
 import { getSecretValue } from '../../../../common/secret/utils';
 import type { McpToolDataType } from '@fastgpt/global/core/app/tool/mcpTool/type';
 import type { HttpToolConfigType } from '@fastgpt/global/core/app/tool/httpTool/type';
@@ -214,6 +214,8 @@ export const dispatchRunTool = async (props: RunToolProps): Promise<RunToolRespo
       const { headerSecret, url } =
         tool.nodes[0].toolConfig?.mcpToolSet ?? tool.nodes[0].inputs[0].value;
 
+      await assertMCPUrlNotInternal(url);
+
       const context = getWorkflowContext();
       // Buffer mcpClient in this workflow
       const mcpClient =
@@ -301,6 +303,8 @@ export const dispatchRunTool = async (props: RunToolProps): Promise<RunToolRespo
       const { toolData, system_toolData, ...restParams } = params;
       const { name: toolName, url, headerSecret } = toolData || system_toolData;
 
+      await assertMCPUrlNotInternal(url);
+
       const mcpClient = new MCPClient({
         url,
         headers: getSecretValue({
diff --git a/packages/service/test/core/app/mcp.test.ts b/packages/service/test/core/app/mcp.test.ts
index d56bcb1054..bd1fff7e20 100644
--- a/packages/service/test/core/app/mcp.test.ts
+++ b/packages/service/test/core/app/mcp.test.ts
@@ -18,7 +18,7 @@ vi.mock('@fastgpt/service/core/app/schema', () => ({
   }
 }));
 
-import { MCPClient, getMCPChildren } from '@fastgpt/service/core/app/mcp';
+import { MCPClient, assertMCPUrlNotInternal, getMCPChildren } from '@fastgpt/service/core/app/mcp';
 import type { AppSchemaType } from '@fastgpt/global/core/app/type';
 
 // Access private client via prototype for spying
@@ -38,6 +38,18 @@ beforeEach(() => {
 describe('MCPClient', () => {
   const config = { url: 'http://localhost:3000/mcp', headers: { Authorization: 'Bearer test' } };
 
+  describe('assertMCPUrlNotInternal', () => {
+    it('should reject localhost MCP endpoints', async () => {
+      await expect(assertMCPUrlNotInternal('http://localhost:3000/mcp')).rejects.toBe(
+        'Request to private network not allowed'
+      );
+    });
+
+    it('should allow public MCP endpoints', async () => {
+      await expect(assertMCPUrlNotInternal('https://example.com/mcp')).resolves.toBeUndefined();
+    });
+  });
+
   // Helper: stub getConnection to avoid real network calls
   const stubConnection = (mcpClient: MCPClient) => {
     const client = getPrivateClient(mcpClient);
diff --git a/projects/app/src/pages/api/core/app/mcpTools/create.ts b/projects/app/src/pages/api/core/app/mcpTools/create.ts
index e0b07e38d2..4182e2ea6d 100644
--- a/projects/app/src/pages/api/core/app/mcpTools/create.ts
+++ b/projects/app/src/pages/api/core/app/mcpTools/create.ts
@@ -17,6 +17,7 @@ import {
   type CreateMcpToolsBodyType,
   type CreateMcpToolsResponseType
 } from '@fastgpt/global/openapi/core/app/mcpTools/api';
+import { assertMCPUrlNotInternal } from '@fastgpt/service/core/app/mcp';
 
 export type createMCPToolsQuery = {};
 
@@ -37,6 +38,8 @@ async function handler(
     ? await authApp({ req, appId: parentId, per: WritePermissionVal, authToken: true })
     : await authUserPer({ req, authToken: true, per: TeamAppCreatePermissionVal });
 
+  await assertMCPUrlNotInternal(url);
+
   await checkTeamAppTypeLimit({ teamId, appCheckType: 'tool' });
 
   const formatedHeaderAuth = storeSecretValue(headerSecret);
diff --git a/projects/app/src/pages/api/core/app/mcpTools/getTools.ts b/projects/app/src/pages/api/core/app/mcpTools/getTools.ts
index 2b43195e34..cdb6a8bcf8 100644
--- a/projects/app/src/pages/api/core/app/mcpTools/getTools.ts
+++ b/projects/app/src/pages/api/core/app/mcpTools/getTools.ts
@@ -1,6 +1,6 @@
 import { NextAPI } from '@/service/middleware/entry';
 import type { ApiRequestProps, ApiResponseType } from '@fastgpt/service/type/next';
-import { MCPClient } from '@fastgpt/service/core/app/mcp';
+import { assertMCPUrlNotInternal, MCPClient } from '@fastgpt/service/core/app/mcp';
 import { getSecretValue } from '@fastgpt/service/common/secret/utils';
 import {
   GetMcpToolsBodySchema,
@@ -8,7 +8,6 @@ import {
   type GetMcpToolsBodyType,
   type GetMcpToolsResponseType
 } from '@fastgpt/global/openapi/core/app/mcpTools/api';
-import { isInternalAddress, PRIVATE_URL_TEXT } from '@fastgpt/service/common/system/utils';
 import { authCert } from '@fastgpt/service/support/permission/auth/common';
 
 async function handler(
@@ -19,9 +18,7 @@ async function handler(
 
   const { url, headerSecret } = GetMcpToolsBodySchema.parse(req.body);
 
-  if (await isInternalAddress(url)) {
-    return Promise.reject(PRIVATE_URL_TEXT);
-  }
+  await assertMCPUrlNotInternal(url);
 
   const mcpClient = new MCPClient({
     url,
diff --git a/projects/app/src/pages/api/core/app/mcpTools/runTool.ts b/projects/app/src/pages/api/core/app/mcpTools/runTool.ts
index fe8e13b4ed..654626f193 100644
--- a/projects/app/src/pages/api/core/app/mcpTools/runTool.ts
+++ b/projects/app/src/pages/api/core/app/mcpTools/runTool.ts
@@ -1,13 +1,12 @@
 import { NextAPI } from '@/service/middleware/entry';
 import type { ApiRequestProps, ApiResponseType } from '@fastgpt/service/type/next';
-import { MCPClient } from '@fastgpt/service/core/app/mcp';
+import { assertMCPUrlNotInternal, MCPClient } from '@fastgpt/service/core/app/mcp';
 import { getSecretValue } from '@fastgpt/service/common/secret/utils';
 import {
   RunMcpToolBodySchema,
   type RunMcpToolBodyType,
   type RunMcpToolResponseType
 } from '@fastgpt/global/openapi/core/app/mcpTools/api';
-import { isInternalAddress, PRIVATE_URL_TEXT } from '@fastgpt/service/common/system/utils';
 import { authCert } from '@fastgpt/service/support/permission/auth/common';
 
 async function handler(
@@ -18,9 +17,7 @@ async function handler(
 
   const { url, toolName, headerSecret, params } = RunMcpToolBodySchema.parse(req.body);
 
-  if (await isInternalAddress(url)) {
-    return Promise.reject(PRIVATE_URL_TEXT);
-  }
+  await assertMCPUrlNotInternal(url);
 
   const mcpClient = new MCPClient({
     url,
diff --git a/projects/app/src/pages/api/core/app/mcpTools/update.ts b/projects/app/src/pages/api/core/app/mcpTools/update.ts
index 87617d73ce..f2ff32a46b 100644
--- a/projects/app/src/pages/api/core/app/mcpTools/update.ts
+++ b/projects/app/src/pages/api/core/app/mcpTools/update.ts
@@ -13,6 +13,7 @@ import {
   UpdateMcpToolsBodySchema,
   type UpdateMcpToolsBodyType
 } from '@fastgpt/global/openapi/core/app/mcpTools/api';
+import { assertMCPUrlNotInternal } from '@fastgpt/service/core/app/mcp';
 
 export type updateMCPToolsQuery = {};
 
@@ -20,6 +21,8 @@ async function handler(req: ApiRequestProps<UpdateMcpToolsBodyType>, res: ApiRes
   const { appId, url, toolList, headerSecret } = UpdateMcpToolsBodySchema.parse(req.body);
   const { app } = await authApp({ req, authToken: true, appId, per: ManagePermissionVal });
 
+  await assertMCPUrlNotInternal(url);
+
   const formatedHeaderAuth = storeSecretValue(headerSecret);
 
   // create tool set node