# Interceptor

> Run web clients without backends by mocking HTTP requests

Canonical page: [https://chrome-stats.com/d/xhr-interceptor](https://chrome-stats.com/d/xhr-interceptor)

## Overview

- **ID:** `xhr-interceptor`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Codemancers
- **Category:** web-development,other
- **Daily users:** 129
- **Weekly downloads:** 2
- **Rating:** 3.40 / 5 (5 ratings)
- **Version:** 0.3.2resigned1
- **Last updated:** 2024-04-25
- **First published:** 2018-04-06
- **Size:** 319 KB
- **Data as of:** 2026-09-08
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/xhr-interceptor/)
- **Website:** [https://github.com/code-mancers/interceptor](https://github.com/code-mancers/interceptor)

## Description

Interceptor is a Chrome extension designed to empower front-end developers by allowing them to mock HTTP requests directly within the browser. This tool eliminates the dependency on backend APIs during the development phase by enabling the user to define custom responses for specific URLs. Each time the browser makes a request, Interceptor returns the predefined mock data instead of reaching out to the server.

By using Interceptor, developers can seamlessly continue their work without waiting for backend endpoints to be available or updated. This streamlines front-end development workflows, supports faster prototyping, and enables easier testing with varied data sets. The extension's codebase and changelog are openly accessible on GitHub, ensuring community collaboration and transparency. For more details, visit the official GitHub repository and documentation to get started with running your web clients sans backend dependencies.

## Rankings

- #10,232 — Overall
- #20 — mock
- #183 — request

## Permissions and access

### Permissions

- `webRequest`
- `tabs`
- `webRequestBlocking`
- `http://*/*`
- `https://*/*`
- `storage`
- `webNavigation`

### Content script matches

- `*`

## Safety

- **Risk impact:** Very high risk impact
- **Risk likelihood:** Low risk likelihood

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

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Source: [Chrome-Stats](https://chrome-stats.com/d/xhr-interceptor)