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API.Guru – API Interceptor & Mock

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Overview

Intercept network requests on the current active tab to mock responses, status codes, and latency.

API Mock & Error Injector is an essential developer tool built for web developers, QA engineers, and test automation specialists. Effortlessly intercept network traffic, inject custom API error statuses, simulate network latencies, and mock endpoint payloads directly in your browser without altering backend code. Key Features Live Network Interception: Dynamically intercept HTTP requests on your active browser tab using Google Chrome Manifest V3. Real-Time API Failure Alerts: Receive native Chrome desktop notifications automatically whenever an intercepted request returns an error status ($\ge 400$). Custom Mocking Rules: Override response bodies, modify status codes (400, 401, 404, 500), and inject network delay to test edge cases. Instant Toggle Control: Enable or disable interceptor rules with a single click right from the extension popup. Dark Mode UI: Modern, lightweight popup UI styled with intuitive status indicators and crisp vector iconography. How to Use Open the API Mock & Error Injector popup from your Chrome toolbar. Configure your custom mocking rules and HTTP status codes. Toggle Enable Interceptor on. Test your frontend UI against simulated network conditions and monitor real-time failure alerts.

Details

  • Version
    4.0.0
  • Updated
    September 30, 2026
  • Size
    36.9KiB
  • Languages
    English
  • Developer
    TECHIEQA SOFTWARE PRIVATE LIMITED
    103 Krishnan Shantipura, 3rd Cross, Bommanahalli (bangalore) Bangalore South Bengaluru, Karnataka 560068 IN
    Website
    Email
    admin@techieqa.com
    Phone
    +91 97423 79422
  • Trader
    This developer has identified itself as a trader per the definition from the European Union and committed to only offer products or services that comply with EU laws.
  • D-U-N-S
    771808141

Privacy

Manage extensions and learn how they're being used in your organization

API.Guru – API Interceptor & Mock has disclosed the following information regarding the collection and usage of your data. More detailed information can be found in the developer's privacy policy.

API.Guru – API Interceptor & Mock handles the following:

User activity

This developer declares that your data is

  • Not being sold to third parties, outside of the approved use cases
  • Not being used or transferred for purposes that are unrelated to the item's core functionality
  • Not being used or transferred to determine creditworthiness or for lending purposes

Support

For help with questions, suggestions, or problems, visit the developer's support site

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