Echo - API Mock & Patch Engine
Offline API mock and patch engine for browser requests.
As of June 2026, Echo - API Mock & Patch Engine has 5 users and a 5.00/5 rating from 2 reviews in the Developer Tools category.
Usersup 25.0 percent+25.0%
5
5
Ratingno change0%
5.00
2 reviews
Reviewsno change0%
2
Version
1.1.0
Manifest V3
History
5 snapshotsTracking since Apr 3, 2026.
View as table
| Date | Users | Rating | Reviews | Version |
|---|---|---|---|---|
| Apr 3, 2026 | 4 | 5.00 | 2 | 1.1.0 |
| Apr 25, 2026 | 3 | 5.00 | 2 | 1.1.0 |
| May 8, 2026 | 4 | 5.00 | 2 | 1.1.0 |
| Jun 1, 2026 | 3 | 5.00 | 2 | 1.1.0 |
| Jun 9, 2026 | 4 | 5.00 | 2 | 1.1.0 |
| Now | 5 | 5.00 | 2 | 1.1.0 |
Permissions & access
- Permissions
- storage
- Host access
- <all_urls>
Screenshots
About
Echo - API Mock & Patch Engine Overview Echo is a powerful developer tool designed to streamline frontend development and testing by giving you complete control over network requests. Intercept `fetch` and `XMLHttpRequest` calls directly in the browser to mock APIs, simulate errors, and test edge cases without modifying your application code. Key Features 1. Request Interception: Capture and control HTTP requests on any page. 2. Mock Responses: Serve custom JSON or text responses instantly. 3. Live Patching: Modify request/response headers, bodies, or status codes on the fly. 4. Network Simulation: Add configurable delays to test loading states and race conditions. 5. Advanced Matching: Target specific requests using URL patterns (exact, contains, regex) and HTTP methods. 6. Offline Development: Continue working even when backend services are down. 7. User-Friendly Interface: Modern UI with a powerful JSON editor and drag-and-drop rule management. Why Install Echo? *Boost Productivity: Stop waiting for backend endpoints to be ready. Mock them in seconds. *Debug Faster: Reproduce hard-to-find bugs by forcing specific API responses or errors (e.g., 500, 404). *Test Safely: Experiment with API changes safely in your browser without risking production data. Perfect for frontend developers, QA engineers, and anyone building web applications.
Technical
- Version
- 1.1.0
- Manifest
- V3
- Size
- 316KiB
- Min Chrome
- 88
- Languages
- 1
- Featured
- No
Metadata
- ID
- lpcoligioeiflkepachhnpgobcmellpc
- Developer ID
- u17b3a8ee7a87248a580a9445907498c9
- Developer Email
- [email protected]
- Created
- Feb 24, 2026
- Last Updated (Store)
- Feb 25, 2026
- Last Scraped
- Jun 9, 2026
- Website
- isdevs.cv
- Support URL
- https://echo.isdevs.cv
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Data sourced from the Chrome Web Store · last verified Jun 9, 2026.