💬 Commit message: Update 2026-02-11 04:16:38, 12 files, 588 lines

📁 Files changed: 12
📝 Lines changed: 588

  • TODO.md
  • browser.d.ts
  • browser.d.ts.map
  • browser.js
  • browser.js.map
  • mcp.js
  • mcp.js.map
  • types.d.ts
  • types.d.ts.map
  • browser.ts
  • mcp.ts
  • types.ts

TODO.md

@@ -5,9 +5,9 @@
 - [ ] Step 1.2: Add Page Errors Command
 
 ## Phase 2: Network Monitoring
-- [ ] Step 2.1: Add Network Logging
+- [x] Step 2.1: Add Network Logging
-- [ ] Step 2.2: Add Failed Requests Filter
+- [x] Step 2.2: Add Failed Requests Filter
-- [ ] Step 2.3: Add Request Interception
+- [x] Step 2.3: Add Request Interception
 
 ## Phase 3: Performance & Metrics
 - [ ] Step 3.1: Add Performance Metrics

dist/browser.d.ts

@@ -1,14 +1,17 @@
 import { type BrowserContext, type Page } from 'playwright';
-import type { BrowserCommand, BrowserOptions, CommandResponse, ConsoleMessage, ElementInfo } from './types.js';
+import type { BrowserCommand, BrowserOptions, CommandResponse, ConsoleMessage, ElementInfo, NetworkEntry } from './types.js';
 export declare class ClaudeBrowser {
     private browser;
     private context;
     private page;
     private options;
     private consoleMessages;
+    private networkEntries;
+    private interceptPatterns;
     constructor(options?: BrowserOptions);
     launch(): Promise<void>;
     private setupConsoleListener;
+    private setupNetworkListener;
     close(): Promise<void>;
     private ensurePage;
     /** Get the current page instance (for advanced usage) */
@@ -47,6 +50,15 @@ export declare class ClaudeBrowser {
     eval(script: string): Promise<unknown>;
     getConsole(level?: string, clear?: boolean): ConsoleMessage[];
     clearConsole(): void;
+    getNetwork(filter?: string, clear?: boolean): NetworkEntry[];
+    clearNetwork(): void;
+    addIntercept(pattern: string, action: 'block' | 'mock', response?: {
+        status?: number;
+        body?: string;
+        contentType?: string;
+    }): Promise<void>;
+    clearIntercepts(): Promise<void>;
+    getInterceptPatterns(): string[];
     executeCommand(cmd: BrowserCommand): Promise<CommandResponse>;
 }
 //# sourceMappingURL=browser.d.ts.map

dist/browser.d.ts.map

@@ -1 +1 @@
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+{"version":3,"file":"browser.d.ts","sourceRoot":"","sources":["../src/browser.ts"],"names":[],"mappings":"AACA,OAAO,EAAgB,KAAK,cAAc,EAAE,KAAK,IAAI,EAAU,MAAM,YAAY,CAAC;AAElF,OAAO,KAAK,EACV,cAAc,EACd,cAAc,EACd,eAAe,EACf,cAAc,EACd,WAAW,EACX,YAAY,EACb,MAAM,YAAY,CAAC;AAEpB,qBAAa,aAAa;IACxB,OAAO,CAAC,OAAO,CAAwB;IACvC,OAAO,CAAC,OAAO,CAA+B;IAC9C,OAAO,CAAC,IAAI,CAAqB;IACjC,OAAO,CAAC,OAAO,CAA2B;IAC1C,OAAO,CAAC,eAAe,CAAwB;IAC/C,OAAO,CAAC,cAAc,CAAsB;IAC5C,OAAO,CAAC,iBAAiB,CAA6H;gBAE1I,OAAO,GAAE,cAAmB;IAQlC,MAAM,IAAI,OAAO,CAAC,IAAI,CAAC;IAa7B,OAAO,CAAC,oBAAoB;IAY5B,OAAO,CAAC,oBAAoB;IAoDtB,KAAK,IAAI,OAAO,CAAC,IAAI,CAAC;IAS5B,OAAO,CAAC,UAAU;IAOlB,yDAAyD;IACzD,OAAO,IAAI,IAAI,GAAG,IAAI;IAItB,gEAAgE;IAChE,UAAU,IAAI,cAAc,GAAG,IAAI;IAI7B,IAAI,CAAC,GAAG,EAAE,MAAM,GAAG,OAAO,CAAC;QAAE,GAAG,EAAE,MAAM,CAAC;QAAC,KAAK,EAAE,MAAM,CAAA;KAAE,CAAC;IAM1D,KAAK,CAAC,QAAQ,EAAE,MAAM,GAAG,OAAO,CAAC;QAAE,GAAG,EAAE,MAAM,CAAA;KAAE,CAAC;IAOjD,IAAI,CAAC,QAAQ,EAAE,MAAM,EAAE,IAAI,EAAE,MAAM,GAAG,OAAO,CAAC,IAAI,CAAC;IAKnD,KAAK,CAAC,QAAQ,EAAE,MAAM,GAAG,OAAO,CAAC,WAAW,EAAE,CAAC;IAiB/C,UAAU,CAAC,IAAI,CAAC,EAAE,MAAM,EAAE,QAAQ,UAAQ,GAAG,OAAO,CAAC;QAAE,IAAI,EAAE,MAAM,CAAC;QAAC,MAAM,CAAC,EAAE,MAAM,CAAA;KAAE,CAAC;IAOvF,MAAM,IAAI,OAAO,CAAC;QAAE,GAAG,EAAE,MAAM,CAAC;QAAC,KAAK,EAAE,MAAM,CAAA;KAAE,CAAC;IAKjD,OAAO,CAAC,IAAI,UAAQ,GAAG,OAAO,CAAC,MAAM,CAAC;IAMtC,IAAI,IAAI,OAAO,CAAC;QAAE,GAAG,EAAE,MAAM,CAAA;KAAE,CAAC;IAMhC,OAAO,IAAI,OAAO,CAAC;QAAE,GAAG,EAAE,MAAM,CAAA;KAAE,CAAC;IAMnC,MAAM,IAAI,OAAO,CAAC;QAAE,GAAG,EAAE,MAAM,CAAA;KAAE,CAAC;IAMlC,IAAI,CAAC,EAAE,SAAO,GAAG,OAAO,CAAC,IAAI,CAAC;IAK9B,OAAO,IAAI,OAAO,CAAC,IAAI,CAAC;IASxB,IAAI,CAAC,MAAM,EAAE,MAAM,GAAG,OAAO,CAAC,OAAO,CAAC;IAK5C,UAAU,CAAC,KAAK,CAAC,EAAE,MAAM,EAAE,KAAK,UAAQ,GAAG,cAAc,EAAE;IAW3D,YAAY,IAAI,IAAI;IAIpB,UAAU,CAAC,MAAM,CAAC,EAAE,MAAM,EAAE,KAAK,UAAQ,GAAG,YAAY,EAAE;IAe1D,YAAY,IAAI,IAAI;IAId,YAAY,CAChB,OAAO,EAAE,MAAM,EACf,MAAM,EAAE,OAAO,GAAG,MAAM,EACxB,QAAQ,CAAC,EAAE;QAAE,MAAM,CAAC,EAAE,MAAM,CAAC;QAAC,IAAI,CAAC,EAAE,MAAM,CAAC;QAAC,WAAW,CAAC,EAAE,MAAM,CAAA;KAAE,GAClE,OAAO,CAAC,IAAI,CAAC;IAyBV,eAAe,IAAI,OAAO,CAAC,IAAI,CAAC;IAQtC,oBAAoB,IAAI,MAAM,EAAE;IAI1B,cAAc,CAAC,GAAG,EAAE,cAAc,GAAG,OAAO,CAAC,eAAe,CAAC;CA6JpE"}

dist/browser.js

@@ -7,6 +7,8 @@ export class ClaudeBrowser {
     page = null;
     options;
     consoleMessages = [];
+    networkEntries = [];
+    interceptPatterns = new Map();
     constructor(options = {}) {
         this.options = {
             headless: options.headless ?? true,
@@ -24,6 +26,7 @@ export class ClaudeBrowser {
         });
         this.page = await this.context.newPage();
         this.setupConsoleListener(this.page);
+        this.setupNetworkListener(this.page);
     }
     setupConsoleListener(page) {
         page.on('console', (msg) => {
@@ -36,6 +39,55 @@ export class ClaudeBrowser {
             });
         });
     }
+    setupNetworkListener(page) {
+        const pendingRequests = new Map();
+        page.on('request', (request) => {
+            const entry = {
+                url: request.url(),
+                method: request.method(),
+                resourceType: request.resourceType(),
+                requestHeaders: request.headers(),
+                timing: { startTime: Date.now() },
+            };
+            pendingRequests.set(request.url() + request.method(), entry);
+        });
+        page.on('response', async (response) => {
+            const request = response.request();
+            const key = request.url() + request.method();
+            const entry = pendingRequests.get(key);
+            if (entry) {
+                entry.status = response.status();
+                entry.statusText = response.statusText();
+                entry.responseHeaders = response.headers();
+                if (entry.timing) {
+                    entry.timing.endTime = Date.now();
+                    entry.timing.duration = entry.timing.endTime - entry.timing.startTime;
+                }
+                try {
+                    const body = await response.body();
+                    entry.size = body.length;
+                }
+                catch {
+                    // Body may not be available for some responses
+                }
+                this.networkEntries.push(entry);
+                pendingRequests.delete(key);
+            }
+        });
+        page.on('requestfailed', (request) => {
+            const key = request.url() + request.method();
+            const entry = pendingRequests.get(key);
+            if (entry) {
+                entry.error = request.failure()?.errorText || 'Request failed';
+                if (entry.timing) {
+                    entry.timing.endTime = Date.now();
+                    entry.timing.duration = entry.timing.endTime - entry.timing.startTime;
+                }
+                this.networkEntries.push(entry);
+                pendingRequests.delete(key);
+            }
+        });
+    }
     async close() {
         if (this.browser) {
             await this.browser.close();
@@ -127,6 +179,7 @@ export class ClaudeBrowser {
         }
         this.page = await this.context.newPage();
         this.setupConsoleListener(this.page);
+        this.setupNetworkListener(this.page);
     }
     async eval(script) {
         const page = this.ensurePage();
@@ -145,6 +198,58 @@ export class ClaudeBrowser {
     clearConsole() {
         this.consoleMessages = [];
     }
+    getNetwork(filter, clear = false) {
+        let entries = this.networkEntries;
+        if (filter && filter !== 'all') {
+            if (filter === 'failed') {
+                entries = entries.filter((e) => e.error || (e.status && e.status >= 400));
+            }
+            else {
+                entries = entries.filter((e) => e.resourceType === filter);
+            }
+        }
+        if (clear) {
+            this.networkEntries = [];
+        }
+        return entries;
+    }
+    clearNetwork() {
+        this.networkEntries = [];
+    }
+    async addIntercept(pattern, action, response) {
+        const page = this.ensurePage();
+        this.interceptPatterns.set(pattern, { action, response });
+        await page.route(pattern, async (route) => {
+            const config = this.interceptPatterns.get(pattern);
+            if (!config) {
+                await route.continue();
+                return;
+            }
+            if (config.action === 'block') {
+                await route.abort();
+            }
+            else if (config.action === 'mock' && config.response) {
+                await route.fulfill({
+                    status: config.response.status || 200,
+                    contentType: config.response.contentType || 'application/json',
+                    body: config.response.body || '',
+                });
+            }
+            else {
+                await route.continue();
+            }
+        });
+    }
+    async clearIntercepts() {
+        const page = this.ensurePage();
+        for (const pattern of this.interceptPatterns.keys()) {
+            await page.unroute(pattern);
+        }
+        this.interceptPatterns.clear();
+    }
+    getInterceptPatterns() {
+        return Array.from(this.interceptPatterns.keys());
+    }
     async executeCommand(cmd) {
         try {
             switch (cmd.cmd) {
@@ -208,6 +313,25 @@ export class ClaudeBrowser {
                     const messages = this.getConsole(cmd.level, cmd.clear);
                     return { ok: true, count: messages.length, messages };
                 }
+                case 'network': {
+                    const requests = this.getNetwork(cmd.filter, cmd.clear);
+                    return { ok: true, count: requests.length, requests };
+                }
+                case 'intercept': {
+                    if (cmd.action === 'list') {
+                        const patterns = this.getInterceptPatterns();
+                        return { ok: true, count: patterns.length, patterns };
+                    }
+                    if (cmd.action === 'clear') {
+                        await this.clearIntercepts();
+                        return { ok: true };
+                    }
+                    if (!cmd.pattern) {
+                        return { ok: false, error: 'Pattern required for block/mock actions' };
+                    }
+                    await this.addIntercept(cmd.pattern, cmd.action, cmd.response);
+                    return { ok: true, patterns: this.getInterceptPatterns() };
+                }
                 case 'favicon': {
                     const result = await image.createFavicon(cmd.input, cmd.outputDir);
                     return { ok: true, files: result.files, outputDir: result.outputDir };

dist/mcp.js

@@ -119,6 +119,49 @@ server.tool('console', 'Get captured console messages (log, warn, error, etc.) f
     const messages = browser.getConsole(level, clear);
     return textResult(JSON.stringify({ ok: true, count: messages.length, messages }));
 }));
+// Network monitoring
+server.tool('network', 'Get captured network requests and responses', {
+    filter: z
+        .enum(['all', 'failed', 'xhr', 'fetch', 'document', 'script', 'stylesheet', 'image'])
+        .optional()
+        .default('all')
+        .describe('Filter by request type or status'),
+    clear: z.boolean().optional().default(false).describe('Clear entries after retrieving'),
+}, withLogging('network', async ({ filter, clear }) => {
+    await ensureLaunched();
+    const requests = browser.getNetwork(filter, clear);
+    return textResult(JSON.stringify({ ok: true, count: requests.length, requests }));
+}));
+server.tool('intercept', 'Block or mock network requests matching a pattern', {
+    action: z.enum(['block', 'mock', 'list', 'clear']).describe('Action to perform'),
+    pattern: z
+        .string()
+        .optional()
+        .describe('URL pattern to match (glob syntax, e.g., "**/api/*" or "**/*.png")'),
+    status: z.number().optional().describe('HTTP status code for mock response'),
+    body: z.string().optional().describe('Response body for mock'),
+    contentType: z
+        .string()
+        .optional()
+        .default('application/json')
+        .describe('Content-Type for mock response'),
+}, withLogging('intercept', async ({ action, pattern, status, body, contentType }) => {
+    await ensureLaunched();
+    if (action === 'list') {
+        const patterns = browser.getInterceptPatterns();
+        return textResult(JSON.stringify({ ok: true, count: patterns.length, patterns }));
+    }
+    if (action === 'clear') {
+        await browser.clearIntercepts();
+        return textResult(JSON.stringify({ ok: true, message: 'All intercepts cleared' }));
+    }
+    if (!pattern) {
+        return textResult(JSON.stringify({ ok: false, error: 'Pattern required for block/mock' }));
+    }
+    const response = action === 'mock' ? { status, body, contentType } : undefined;
+    await browser.addIntercept(pattern, action, response);
+    return textResult(JSON.stringify({ ok: true, action, pattern, patterns: browser.getInterceptPatterns() }));
+}));
 // Utility
 server.tool('wait', 'Wait for a specified time in milliseconds', { ms: z.number().optional().default(1000) }, withLogging('wait', async ({ ms }) => {
     await ensureLaunched();
@@ -374,6 +417,57 @@ server.resource('Console Messages', 'browser://console', { description: 'Console
         ],
     };
 });
+// Resource: browser://network - All captured network requests
+server.resource('Network Requests', 'browser://network', { description: 'All network requests captured from the browser', mimeType: 'application/json' }, async () => {
+    if (!launched) {
+        return {
+            contents: [
+                {
+                    uri: 'browser://network',
+                    mimeType: 'application/json',
+                    text: JSON.stringify({ launched: false, requests: [] }),
+                },
+            ],
+        };
+    }
+    const requests = browser.getNetwork('all', false);
+    return {
+        contents: [
+            {
+                uri: 'browser://network',
+                mimeType: 'application/json',
+                text: JSON.stringify({ launched: true, count: requests.length, requests }),
+            },
+        ],
+    };
+});
+// Resource: browser://network/failed - Failed network requests only
+server.resource('Failed Requests', 'browser://network/failed', {
+    description: 'Failed network requests (errors and 4xx/5xx status codes)',
+    mimeType: 'application/json',
+}, async () => {
+    if (!launched) {
+        return {
+            contents: [
+                {
+                    uri: 'browser://network/failed',
+                    mimeType: 'application/json',
+                    text: JSON.stringify({ launched: false, requests: [] }),
+                },
+            ],
+        };
+    }
+    const requests = browser.getNetwork('failed', false);
+    return {
+        contents: [
+            {
+                uri: 'browser://network/failed',
+                mimeType: 'application/json',
+                text: JSON.stringify({ launched: true, count: requests.length, requests }),
+            },
+        ],
+    };
+});
 // Resource: browser://screenshot - Current page screenshot (base64)
 server.resource('Page Screenshot', 'browser://screenshot', { description: 'Screenshot of the current page as base64 PNG', mimeType: 'image/png' }, async () => {
     if (!launched) {

dist/types.d.ts

@@ -111,7 +111,38 @@ export interface ConsoleMessage {
     timestamp: number;
     location?: string;
 }
-export type BrowserCommand = GotoCommand | ClickCommand | TypeCommand | QueryCommand | ScreenshotCommand | UrlCommand | HtmlCommand | BackCommand | ForwardCommand | ReloadCommand | WaitCommand | NewPageCommand | CloseCommand | EvalCommand | FaviconCommand | ConvertCommand | ResizeCommand | CropCommand | CompressCommand | ThumbnailCommand | ConsoleCommand;
+export interface NetworkEntry {
+    url: string;
+    method: string;
+    resourceType: string;
+    status?: number;
+    statusText?: string;
+    requestHeaders?: Record<string, string>;
+    responseHeaders?: Record<string, string>;
+    timing?: {
+        startTime: number;
+        endTime?: number;
+        duration?: number;
+    };
+    size?: number;
+    error?: string;
+}
+export interface NetworkCommand {
+    cmd: 'network';
+    clear?: boolean;
+    filter?: 'all' | 'failed' | 'xhr' | 'fetch' | 'document' | 'script' | 'stylesheet' | 'image';
+}
+export interface InterceptCommand {
+    cmd: 'intercept';
+    action: 'block' | 'mock' | 'list' | 'clear';
+    pattern?: string;
+    response?: {
+        status?: number;
+        body?: string;
+        contentType?: string;
+    };
+}
+export type BrowserCommand = GotoCommand | ClickCommand | TypeCommand | QueryCommand | ScreenshotCommand | UrlCommand | HtmlCommand | BackCommand | ForwardCommand | ReloadCommand | WaitCommand | NewPageCommand | CloseCommand | EvalCommand | FaviconCommand | ConvertCommand | ResizeCommand | CropCommand | CompressCommand | ThumbnailCommand | ConsoleCommand | NetworkCommand | InterceptCommand;
 export interface SuccessResponse {
     ok: true;
     url?: string;
@@ -128,6 +159,8 @@ export interface SuccessResponse {
     format?: string;
     size?: number;
     messages?: ConsoleMessage[];
+    requests?: NetworkEntry[];
+    patterns?: string[];
 }
 export interface ErrorResponse {
     ok: false;

dist/types.d.ts.map

@@ -1 +1 @@
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src/browser.ts

@@ -1,5 +1,5 @@
 import { resolve } from 'node:path';
-import { type Browser, type BrowserContext, type Page, webkit } from 'playwright';
+import { type Browser, type BrowserContext, type Page, type Route, webkit } from 'playwright';
 import * as image from './image.js';
 import type {
   BrowserCommand,
@@ -7,6 +7,7 @@ import type {
   CommandResponse,
   ConsoleMessage,
   ElementInfo,
+  NetworkEntry,
 } from './types.js';
 
 export class ClaudeBrowser {
@@ -15,6 +16,14 @@ export class ClaudeBrowser {
   private page: Page | null = null;
   private options: Required<BrowserOptions>;
   private consoleMessages: ConsoleMessage[] = [];
+  private networkEntries: NetworkEntry[] = [];
+  private interceptPatterns: Map<
+    string,
+    {
+      action: 'block' | 'mock';
+      response?: { status?: number; body?: string; contentType?: string };
+    }
+  > = new Map();
 
   constructor(options: BrowserOptions = {}) {
     this.options = {
@@ -34,6 +43,7 @@ export class ClaudeBrowser {
     });
     this.page = await this.context.newPage();
     this.setupConsoleListener(this.page);
+    this.setupNetworkListener(this.page);
   }
 
   private setupConsoleListener(page: Page): void {
@@ -48,6 +58,58 @@ export class ClaudeBrowser {
     });
   }
 
+  private setupNetworkListener(page: Page): void {
+    const pendingRequests = new Map<string, NetworkEntry>();
+
+    page.on('request', (request) => {
+      const entry: NetworkEntry = {
+        url: request.url(),
+        method: request.method(),
+        resourceType: request.resourceType(),
+        requestHeaders: request.headers(),
+        timing: { startTime: Date.now() },
+      };
+      pendingRequests.set(request.url() + request.method(), entry);
+    });
+
+    page.on('response', async (response) => {
+      const request = response.request();
+      const key = request.url() + request.method();
+      const entry = pendingRequests.get(key);
+      if (entry) {
+        entry.status = response.status();
+        entry.statusText = response.statusText();
+        entry.responseHeaders = response.headers();
+        if (entry.timing) {
+          entry.timing.endTime = Date.now();
+          entry.timing.duration = entry.timing.endTime - entry.timing.startTime;
+        }
+        try {
+          const body = await response.body();
+          entry.size = body.length;
+        } catch {
+          // Body may not be available for some responses
+        }
+        this.networkEntries.push(entry);
+        pendingRequests.delete(key);
+      }
+    });
+
+    page.on('requestfailed', (request) => {
+      const key = request.url() + request.method();
+      const entry = pendingRequests.get(key);
+      if (entry) {
+        entry.error = request.failure()?.errorText || 'Request failed';
+        if (entry.timing) {
+          entry.timing.endTime = Date.now();
+          entry.timing.duration = entry.timing.endTime - entry.timing.startTime;
+        }
+        this.networkEntries.push(entry);
+        pendingRequests.delete(key);
+      }
+    });
+  }
+
   async close(): Promise<void> {
     if (this.browser) {
       await this.browser.close();
@@ -156,6 +218,7 @@ export class ClaudeBrowser {
     }
     this.page = await this.context.newPage();
     this.setupConsoleListener(this.page);
+    this.setupNetworkListener(this.page);
   }
 
   async eval(script: string): Promise<unknown> {
@@ -178,6 +241,68 @@ export class ClaudeBrowser {
     this.consoleMessages = [];
   }
 
+  getNetwork(filter?: string, clear = false): NetworkEntry[] {
+    let entries = this.networkEntries;
+    if (filter && filter !== 'all') {
+      if (filter === 'failed') {
+        entries = entries.filter((e) => e.error || (e.status && e.status >= 400));
+      } else {
+        entries = entries.filter((e) => e.resourceType === filter);
+      }
+    }
+    if (clear) {
+      this.networkEntries = [];
+    }
+    return entries;
+  }
+
+  clearNetwork(): void {
+    this.networkEntries = [];
+  }
+
+  async addIntercept(
+    pattern: string,
+    action: 'block' | 'mock',
+    response?: { status?: number; body?: string; contentType?: string }
+  ): Promise<void> {
+    const page = this.ensurePage();
+    this.interceptPatterns.set(pattern, { action, response });
+    await page.route(pattern, (route) => this.handleIntercept(pattern, route));
+  }
+
+  private async handleIntercept(pattern: string, route: Route): Promise<void> {
+    const config = this.interceptPatterns.get(pattern);
+    if (!config) {
+      await route.continue();
+      return;
+    }
+    if (config.action === 'block') {
+      await route.abort();
+      return;
+    }
+    if (config.action === 'mock' && config.response) {
+      await route.fulfill({
+        status: config.response.status || 200,
+        contentType: config.response.contentType || 'application/json',
+        body: config.response.body || '',
+      });
+      return;
+    }
+    await route.continue();
+  }
+
+  async clearIntercepts(): Promise<void> {
+    const page = this.ensurePage();
+    for (const pattern of this.interceptPatterns.keys()) {
+      await page.unroute(pattern);
+    }
+    this.interceptPatterns.clear();
+  }
+
+  getInterceptPatterns(): string[] {
+    return Array.from(this.interceptPatterns.keys());
+  }
+
   async executeCommand(cmd: BrowserCommand): Promise<CommandResponse> {
     try {
       switch (cmd.cmd) {
@@ -241,6 +366,25 @@ export class ClaudeBrowser {
           const messages = this.getConsole(cmd.level, cmd.clear);
           return { ok: true, count: messages.length, messages };
         }
+        case 'network': {
+          const requests = this.getNetwork(cmd.filter, cmd.clear);
+          return { ok: true, count: requests.length, requests };
+        }
+        case 'intercept': {
+          if (cmd.action === 'list') {
+            const patterns = this.getInterceptPatterns();
+            return { ok: true, count: patterns.length, patterns };
+          }
+          if (cmd.action === 'clear') {
+            await this.clearIntercepts();
+            return { ok: true };
+          }
+          if (!cmd.pattern) {
+            return { ok: false, error: 'Pattern required for block/mock actions' };
+          }
+          await this.addIntercept(cmd.pattern, cmd.action, cmd.response);
+          return { ok: true, patterns: this.getInterceptPatterns() };
+        }
         case 'favicon': {
           const result = await image.createFavicon(cmd.input, cmd.outputDir);
           return { ok: true, files: result.files, outputDir: result.outputDir };

src/mcp.ts

@@ -202,6 +202,63 @@ server.tool(
   })
 );
 
+// Network monitoring
+server.tool(
+  'network',
+  'Get captured network requests and responses',
+  {
+    filter: z
+      .enum(['all', 'failed', 'xhr', 'fetch', 'document', 'script', 'stylesheet', 'image'])
+      .optional()
+      .default('all')
+      .describe('Filter by request type or status'),
+    clear: z.boolean().optional().default(false).describe('Clear entries after retrieving'),
+  },
+  withLogging('network', async ({ filter, clear }) => {
+    await ensureLaunched();
+    const requests = browser.getNetwork(filter, clear);
+    return textResult(JSON.stringify({ ok: true, count: requests.length, requests }));
+  })
+);
+
+server.tool(
+  'intercept',
+  'Block or mock network requests matching a pattern',
+  {
+    action: z.enum(['block', 'mock', 'list', 'clear']).describe('Action to perform'),
+    pattern: z
+      .string()
+      .optional()
+      .describe('URL pattern to match (glob syntax, e.g., "**/api/*" or "**/*.png")'),
+    status: z.number().optional().describe('HTTP status code for mock response'),
+    body: z.string().optional().describe('Response body for mock'),
+    contentType: z
+      .string()
+      .optional()
+      .default('application/json')
+      .describe('Content-Type for mock response'),
+  },
+  withLogging('intercept', async ({ action, pattern, status, body, contentType }) => {
+    await ensureLaunched();
+    if (action === 'list') {
+      const patterns = browser.getInterceptPatterns();
+      return textResult(JSON.stringify({ ok: true, count: patterns.length, patterns }));
+    }
+    if (action === 'clear') {
+      await browser.clearIntercepts();
+      return textResult(JSON.stringify({ ok: true, message: 'All intercepts cleared' }));
+    }
+    if (!pattern) {
+      return textResult(JSON.stringify({ ok: false, error: 'Pattern required for block/mock' }));
+    }
+    const response = action === 'mock' ? { status, body, contentType } : undefined;
+    await browser.addIntercept(pattern, action, response);
+    return textResult(
+      JSON.stringify({ ok: true, action, pattern, patterns: browser.getInterceptPatterns() })
+    );
+  })
+);
+
 // Utility
 server.tool(
   'wait',
@@ -561,6 +618,69 @@ server.resource(
   }
 );
 
+// Resource: browser://network - All captured network requests
+server.resource(
+  'Network Requests',
+  'browser://network',
+  { description: 'All network requests captured from the browser', mimeType: 'application/json' },
+  async () => {
+    if (!launched) {
+      return {
+        contents: [
+          {
+            uri: 'browser://network',
+            mimeType: 'application/json',
+            text: JSON.stringify({ launched: false, requests: [] }),
+          },
+        ],
+      };
+    }
+    const requests = browser.getNetwork('all', false);
+    return {
+      contents: [
+        {
+          uri: 'browser://network',
+          mimeType: 'application/json',
+          text: JSON.stringify({ launched: true, count: requests.length, requests }),
+        },
+      ],
+    };
+  }
+);
+
+// Resource: browser://network/failed - Failed network requests only
+server.resource(
+  'Failed Requests',
+  'browser://network/failed',
+  {
+    description: 'Failed network requests (errors and 4xx/5xx status codes)',
+    mimeType: 'application/json',
+  },
+  async () => {
+    if (!launched) {
+      return {
+        contents: [
+          {
+            uri: 'browser://network/failed',
+            mimeType: 'application/json',
+            text: JSON.stringify({ launched: false, requests: [] }),
+          },
+        ],
+      };
+    }
+    const requests = browser.getNetwork('failed', false);
+    return {
+      contents: [
+        {
+          uri: 'browser://network/failed',
+          mimeType: 'application/json',
+          text: JSON.stringify({ launched: true, count: requests.length, requests }),
+        },
+      ],
+    };
+  }
+);
+
 // Resource: browser://screenshot - Current page screenshot (base64)
 server.resource(
   'Page Screenshot',

src/types.ts

@@ -137,6 +137,40 @@ export interface ConsoleMessage {
   location?: string;
 }
 
+export interface NetworkEntry {
+  url: string;
+  method: string;
+  resourceType: string;
+  status?: number;
+  statusText?: string;
+  requestHeaders?: Record<string, string>;
+  responseHeaders?: Record<string, string>;
+  timing?: {
+    startTime: number;
+    endTime?: number;
+    duration?: number;
+  };
+  size?: number;
+  error?: string;
+}
+
+export interface NetworkCommand {
+  cmd: 'network';
+  clear?: boolean;
+  filter?: 'all' | 'failed' | 'xhr' | 'fetch' | 'document' | 'script' | 'stylesheet' | 'image';
+}
+
+export interface InterceptCommand {
+  cmd: 'intercept';
+  action: 'block' | 'mock' | 'list' | 'clear';
+  pattern?: string;
+  response?: {
+    status?: number;
+    body?: string;
+    contentType?: string;
+  };
+}
+
 export type BrowserCommand =
   | GotoCommand
   | ClickCommand
@@ -158,7 +192,9 @@ export type BrowserCommand =
   | CropCommand
   | CompressCommand
   | ThumbnailCommand
-  | ConsoleCommand;
+  | ConsoleCommand
+  | NetworkCommand
+  | InterceptCommand;
 
 // Response types
 export interface SuccessResponse {
@@ -179,6 +215,9 @@ export interface SuccessResponse {
   size?: number;
   // Console fields
   messages?: ConsoleMessage[];
+  // Network fields
+  requests?: NetworkEntry[];
+  patterns?: string[];
 }
 
 export interface ErrorResponse {