Last Updated: February 20, 2026
Echo (“the Extension”) is a developer-focused Chrome extension for request interception and mocking. This policy explains how Echo handles your information. We do not collect, sell, or share your data.
Echo does not collect, store, or transmit any of the following to external servers or third parties:
All processing described below happens only on your device.
Echo intercepts network requests (e.g. fetch and XHR) only to apply your own rules (mocking, patching, or other modifications). This is done entirely in your browser; no request data is sent elsewhere.
Your rules and configuration are stored only on your machine using:
We do not have access to this data. It remains under your control and stays on your device.
| Permission | Purpose |
|---|---|
| Host permissions | To inject the logic needed for request interception on the pages you choose. Echo does not monitor or record general browsing activity. |
| Storage | To save your settings and mock rules (e.g. globally or per site). |
Permissions are used only for these developer-tool features, not for tracking or analytics.
Echo does not integrate with third-party analytics, tracking, or advertising. The extension works offline and does not send data to any external service.
We may update this privacy policy from time to time. The “Last Updated” date at the top will reflect the latest version. Continued use of Echo after changes means you accept the updated policy.
Questions about this policy or Echo’s privacy practices:
Echo is built for developers who need local control over network requests. Your data stays on your device.