Moqyy — API Mocking & Fetch/XHR Interceptor

About

Moqyy is the easiest way for frontend developers and QA testers to mock API responses and intercept network requests inside the browser.

Mock APIs instantly, intercept **fetch** and **XMLHttpRequest (XHR)** calls, and test your frontend without waiting for backend endpoints. Moqyy is lightweight, fast, and built specifically for modern frontend workflows (React, Vue, Next.js, Angular).

Key features
• Intercept **fetch** and **XHR** calls.
• Create API mock rules in one click.
• Auto-fill request/response patterns and templates.
• Save mock rules locally and import/export JSON.
• Enable/Disable mocks globally or per-rule.
• Capture real responses to use as a mock (Auto-capture).
• Test different server responses (200, 400, 500, custom JSON).
• Lightweight extension that won’t clutter your devtools.

Who should use Moqyy
• Frontend developers building UI without backend readiness.
• QA teams testing client behavior for edge/backend error states.
• Engineers who need fast, local API mocks without complex setup.

Quick start
1. Install the extension.
2. Open the Network tab in Moqyy and trigger a fetch/XHR from your app.
3. Click the “+” next to a request to create a mock.
4. Edit the mock response and enable it — refresh your app and see the mocked response in action.

Why Moqyy vs other tools
• Focused on **API mocking** for frontend workflows (not a general network toolbox).  
• Simpler onboarding and a modern UI that developers prefer.  
• Built for speed — create useful mocks in under 30 seconds.

If you find issues or want features, use the in-extension Feedback button — we read every message.