How does the browser restart process work?

The skill identifies active browser processes, safely terminates them, relaunches the browser with the Remote Debugging Port enabled, extracts the data, and then reopens the browser in its normal state.

Which browsers does Auth Sniffer support?

Auth Sniffer currently supports Brave, Chrome, and Microsoft Edge browser engines.

Is the extraction process deterministic?

Yes, it follows a strict preflight, execution, and restoration flow to ensure consistent results and minimize browser state disruption.

What kind of data can be extracted using this skill?

It can retrieve domain-specific cookies, localStorage keys, and sessionStorage values in a structured JSON format.

Does this skill require me to share my passwords?

No. The skill extracts existing session tokens (cookies and storage keys) from your already-logged-in browser session rather than asking for plaintext passwords.

Auth Sniffer

Name: Auth Sniffer
Author: lev-os

bylev-os

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Browser Automation

Extracts authentication tokens and session data from active browser sessions for seamless AI agent integration.

The Auth Sniffer skill enables Claude to securely capture authentication states—including cookies, localStorage, and sessionStorage—from Brave, Chrome, or Edge browsers. By leveraging the Chrome DevTools Protocol (CDP), it automates a deterministic workflow that briefly restarts the browser in a controlled debugging mode, extracts specific credentials required for services like Twitter/X, and restores the browser to its original state. This allows agents to perform authenticated web actions on behalf of the user without requiring manual login prompts or credential management.

Key Features

01Structured JSON output with comprehensive error handling

02Automated browser lifecycle management via CDP

03Deterministic extraction of cookies, localStorage, and sessionStorage

04Service-specific robot mode for common web platforms

05Cross-browser support for Brave, Chrome, and Microsoft Edge

061 GitHub stars

Use Cases

01Bypassing manual login hurdles in complex browser automation flows

02Automating authenticated social media interactions for agents

03Synchronizing active session state to headless scrapers

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add lev-os/agents auth-sniffer

For use in Claude.ai and ChatGPT