GitHub Repository

An agentic AI Chrome extension that autonomously understands website APIs, analyzes page structure, and generates custom scripts through natural language prompts. Think of it as a Cursor-like AI assistant, but for any website you're browsing.

7 starsTypeScript

Chrome extension that hijacks any site's own API to modify it

Name: Chrome extension that hijacks any site's own API to modify it
Availability: InStock
Author: hvardhan878

by hvardhan878·Mar 17, 2026·1 point·0 comments

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AI Analysis

●●SolidBig BrainWizardry

API interception beats fragile DOM selectors, but browser agents are crowded.

Strengths

•Wire-level API capture means scripts survive frontend redesigns better than scrapers.
•Persistent per-domain scripts that re-inject on every page load automatically.
•Cursor-style task tracking shows agent reasoning in real time.

Weaknesses

•Chrome MV3 limitations may constrain long-term viability of background interception.
•OpenAI dependency means costs add up for heavy script generation workflows.

Post Description

Most browser agents click around websites like a user. Quark goes deeper. It sits passively in your browser, maps every API call a site makes to its own backend, then lets you describe what you want in plain English.

It generates a script that modifies the site permanently using that live API context.

In the demo I searched Amazon and typed one sentence. It built a floating CSV exporter using Amazon's own internal search API. No HTML scraping, no manual selectors. Same approach works on LinkedIn, GitHub, Jira, HubSpot, or any site with network traffic.

Scripts persist per domain and re-inject on every page load. It is less like a task agent and more like a permanent layer on top of any website you use.

GitHub: https://github.com/hvardhan878/quark-browser-agent Would love feedback on the architecture and whether this approach holds up long term given Chrome MV3.