Is Postman Interceptor safe?
Postman Interceptor captures browser HTTP requests and cookies and forwards them to the local Postman desktop app.
The extension uses Chrome's webRequest API to capture HTTP traffic and cookies from any website, then sends this data to the locally-running Postman application via native messaging (com.postman.postmanapp) or a WebSocket on localhost. Request data is encrypted using AES with a key that defaults to a hardcoded value ('postman_default_key') until the user configures a custom one. The content script is scoped only to postman.co domains, but the background service worker can reach any URL through its host permissions.
Part of this rating comes from analysis signals we haven't published as detailed findings yet.
Who publishes itPostman Inc. - 1 other listing from the same operator, none carrying a finding
Postman Inc. - 1 other listing from the same operator, none carrying a finding
What this publisher told the store about itself, and the other listings that told it the same thing.
Same store account
1 other listing published from this account, 600k+ users between them, none of them carrying a finding.
Shared hosts - 4 hostnames
Hostnames hardcoded in this extension that few other listings call. That can mean one operator behind both, and it can equally mean a small shared vendor, so it is context rather than a conclusion. Hosts that many listings call are left out: they are services, not connections.
AI-generated. Findings may contain errors. Those marked Verified have been manually reviewed.
Publishers can request a review.
What it can do
Permissions this extension asks for, as declared in version 3.2.1. Asking for a permission is not a finding on its own - it is what the extension can do if it chooses to.
Read and change your data on every site you visit
*://*/**
Watch every request your browser makes
webRequest
Talk to a program installed on your computer, outside the browser's sandbox
nativeMessaging
Store data in your browser
storage
Read and change cookies, including the ones that keep you signed in
cookies
Run its own code inside the pages you visit
scripting
See the address and title of every tab you have open
tabs
Where it sends data
Destinations our analysis observed Postman Interceptor contacting. Sending data somewhere is not a finding on its own - an extension that syncs your settings has to talk to its own server - but it is where your data can go, and who else it goes to.
- localhost (Postman desktop app via native messaging)
Postman Interceptor sends data to localhost (Postman desktop app via native messaging). Named as a recipient in this extension's own analysis.
- ws://localhost:8099
Postman Interceptor sends data to ws://localhost:8099. Named as a recipient in this extension's own analysis.