🛠️ EZ Mocker ~ HTTP request interceptor

A lightweight, no-dependency Chrome extension that intercepts both fetch and XMLHttpRequest calls. It enables you to mock API responses with custom status codes, headers, delays, and full JSON bodies while your original request still reaches its destination.

🚀 Weighs only 100KB and uses chromium-based APIs.

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📸 How it looks and feels?

Ez and sexy. 3 main buttons, 2 sections:

🎯 Create Custom Rules Easily

📋 View, Edit, Enable/Disable Your Rules

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⚙️ Key Features

• ✅ Intercepts fetch and XMLHttpRequest

• 🧪 Mock:

  • JSON response body
  • Status codes
  • Response headers
  • Delay (in milliseconds) (Only available with fetch, sorry, shit's hard enough)

• 🔍 Powerful URL filtering:

  • INCLUDES, STARTS WITH, ENDS WITH, EXACT MATCH or REGEX

• 🧭 Match by:

  • HTTP method
  • Status code
  • Alias

• 💀 Easily import and export your rules as a JSON collection

• 🧩 Built without any library dependencies, just loads of caffeine

• ⚡ Ultra lightweight — just 100KB

• 🧠 FREE! Your limit is chrome storage and the power of will, I'm not even sure what's the actual limit

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🧑‍💻 Use Case Examples

• Simulate backend responses during frontend development
• Test how your app handles failed requests (e.g., 500, 404)
• Quickly switch between different mock scenarios

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🛠️ Installation

1. Download or clone this repository.
2. Go to chrome://extensions/ in your browser.
3. Enable Developer Mode (top right).
4. Click Load unpacked and select the extension folder.
5. Why isn't this in the store? Not gonna pay a cent.

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🧾 License

MIT License. Free to use and modify. Limit interceptors to 5-12 request as i've seen across multiple extensions should be considered a crime so I built this out of spite. Take care y'all, until AGI replace us.