Hubcap

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Hubcap is an AI Agents & Automation tool that provides a Chrome DevTools Protocol CLI for AI agents. It enables low-level browser automation, including network interception, performance profiling, and DOM manipulation.

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At a glance

Pricing

Open Source

Free tier

Yes

API

Skill level

Technical

About

What is Hubcap?

Hubcap is a Go binary that wraps the entire Chrome DevTools Protocol (CDP) into 118 composable command-line commands, specifically designed for AI agents. It offers a powerful alternative to traditional browser automation methods by providing direct, low-level access to browser functionalities like network interception, performance profiling, and DOM manipulation. Each command outputs structured JSON, uses semantic exit codes, and works seamlessly with standard Unix tools, making it trivial for AI agents to invoke without SDKs or complex websocket management. This stateless design optimizes for Agentic Experience (AX), allowing agents to explore capabilities, debug, and monitor browser activities efficiently.

Best used for

Ideal for developers and AI engineers who need to automate complex browser interactions, extract detailed web data, and perform low-level debugging and monitoring. Especially valuable for building robust web scraping tools, advanced testing frameworks, and sophisticated AI-driven browser automation solutions.

Common actions

automate browser tasks

scrape web data

debug web applications

monitor web performance

emulate browser environments

browser automationCDPAI agentChrome DevToolsDeveloper toolGotestingopen-sourceWeb scraping

Capabilities

Key features

Chrome DevTools Protocol CLI
Structured JSON output
Semantic exit codes
Composable commands
Stateless operation
Network interception
Performance profiling

Target Audience

developerdata scientist

Integrations

Not yet documented

Pricing & Plans

Open Source

FAQs

What is the primary advantage of Hubcap over other browser automation tools?

Hubcap offers direct, low-level access to the full Chrome DevTools Protocol, enabling capabilities like network interception, heap snapshots, and device emulation that go beyond basic navigation. Its design for AI agents, with JSON output and semantic exit codes, minimizes overhead and maximizes reliability for automated workflows.

How does Hubcap integrate with AI agents?

Hubcap is designed for seamless integration with AI agents through simple shell commands. It outputs structured JSON and uses clear exit codes, allowing agents to easily parse results and understand command outcomes without complex SDKs or managing session state. A Claude Code skill is also available for direct integration.

What kind of browser actions can Hubcap automate?

Hubcap can automate a wide range of browser actions, including navigation, form filling, element clicking, and screenshot capture. Beyond basics, it supports network request interception, performance tracing, memory profiling, device emulation, and real-time monitoring of console output and JavaScript errors.

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