mcp-console-hub

mcp-console-hub

Your browser's DevTools, streamed to your IDE's AI agent.

What It Captures

DevTools Tab	What's Captured	Details
Console	console.error/warn/log/info/debug	With stack traces for errors/warnings
Console	Unhandled exceptions	window.onerror with file + line + column
Console	Promise rejections	unhandledrejection with stack
Network	All fetch/XHR requests	Method, URL, status, duration, headers, body preview, size
Network	Failed requests	4xx, 5xx, connection errors with details
Application	localStorage	All key-value pairs
Application	sessionStorage	All key-value pairs
Application	Cookies	Name, value, domain, path
Application	IndexedDB	Database names
Performance	Navigation timing	TTFB, DOM loaded, load complete, DNS, connect
Performance	Resource loading	JS, CSS, images, fonts with duration + size
Performance	Memory	Heap size (Chrome only)
Performance	Marks & Measures	Custom performance marks

Zero code changes. One bookmarklet. Works with any web app.

Quick Start

1. Configure your IDE

Cursor

{
  "mcpServers": {
    "mcp-console-hub": {
      "command": "npx",
      "args": ["-y", "mcp-console-hub@latest"]
    }
  }
}

VSCode

{
  "servers": {
    "mcp-console-hub": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "mcp-console-hub@latest"]
    }
  }
}

Claude Code

claude mcp add mcp-console-hub npx -y mcp-console-hub@latest

Antigravity / Windsurf / OpenCode

{
  "mcpServers": {
    "mcp-console-hub": {
      "command": "npx",
      "args": ["-y", "mcp-console-hub@latest"]
    }
  }
}

2. Connect your browser

Open http://localhost:3200 — drag the bookmarklet to your bookmarks bar.

Navigate to any web app. Click the bookmarklet.

3. Ask your AI agent

@mcp-console-hub Diagnose all errors and suggest fixes
@mcp-console-hub Show all network failures
@mcp-console-hub Read localStorage and explain the app state
@mcp-console-hub Audit page performance
@mcp-console-hub Fix errors by priority — most critical first

MCP Tools (24 tools)

Console (7 tools)

Tool	Description
query_console	Filter by level, source, text, time, stack
get_entry_context	Full context with parsed stack frames + timeline
get_error_chains	Detect cascading errors (root cause analysis)
get_repeated_patterns	Find recurring messages
parse_stack_trace	Structured frames: function, file, line, col
find_by_file	Find all errors from a specific source file
get_unhandled_errors	Runtime exceptions + promise rejections

Network (4 tools)

Tool	Description
query_network	Filter by method, status, URL, duration
get_network_detail	Full request/response: headers, body, timing
get_network_errors	All 4xx, 5xx, and connection failures
get_slow_requests	Requests above duration threshold

Storage (3 tools)

Tool	Description
read_storage	All storage: localStorage, sessionStorage, cookies, IndexedDB
read_storage_key	Read specific key with auto JSON parse
get_cookies	List/search cookies

Performance (2 tools)

Tool	Description
get_performance	Navigation timing, resources, memory, marks
get_slow_resources	Find slow-loading JS, CSS, images, fonts

General (4 tools)

Tool	Description
get_console_stats	Aggregated statistics
get_page_info	Page URL, user agent, all data availability
get_timeline	Chronological event sequence
clear_console	Clear all captured data

Export (1 tool)

Tool	Description
export_report	Full DevTools report as JSON or Markdown

MCP Prompts (7 prompts)

Prompt	Trigger	Description
diagnose	/diagnose	Full analysis of errors + network + performance
fix_by_priority	/fix_by_priority	Prioritized fix list: Critical > High > Medium
suggest_solution	/suggest_solution	Concrete code fix for the most recent error
debug_network	/debug_network	Analyze failures, CORS issues, auth errors
read_app_state	/read_app_state	Analyze storage to understand app state
performance_audit	/performance_audit	Page load audit with optimization suggestions
fix_entry	/fix_entry	Step-by-step fix for the latest error

MCP Resources (12 resources)

URI	Description
console://entries	All console entries
console://errors	Error-level only
console://warnings	Warning-level only
console://timeline	Chronological timeline
console://summary	Aggregated stats
network://requests	All network requests
network://errors	Failed requests
network://slow	Slow requests (>1s)
storage://snapshot	Full storage snapshot
storage://cookies	Cookies only
performance://data	All performance data
devtools://page	Page info + data availability

How It Works

Browser (any web app)              MCP Console Hub                     IDE AI Agent
+-----------------+               +--------------------+              +----------------+
| Bookmarklet     |  WebSocket    |                    |    stdio     |                |
| captures:       |==============>|  Console Store     |<===========>|  24 MCP Tools  |
|                 |  :3201        |  Network Store     |              |  12 Resources  |
| - console.*     |               |  Storage Snapshot  |              |  7 Prompts     |
| - window.onerror|  HTTP POST    |  Performance Data  |              |                |
| - fetch/XHR     |-------------->|                    |              |  Cursor        |
| - localStorage  |  :3200        |  File-backed       |              |  VSCode        |
| - cookies       |               |  (.store/)         |              |  Claude Code   |
| - performance   |               |                    |              |  Antigravity   |
+-----------------+               +--------------------+              +----------------+
  zero code changes                  npx mcp-console-hub               IDE MCP config

Ports & Environment

Port	Protocol	Purpose
3200	HTTP	Connector page + health + ingestion
3201	WebSocket	Real-time data streaming

Variable	Default	Description
MCP_CONSOLE_HUB_PORT	3200	HTTP port
MCP_CONSOLE_HUB_WS_PORT	3201	WebSocket port
MCP_CONSOLE_HUB_STORE_PATH	auto	Custom store file path

License

MIT — see LICENSE

_{Built by nano-step — Copyright © 2026 Hoai Nho Nguyen}