MCP Error Hub — Real-time Error Debugging for IDE AI Agents

The problem we solve

Stop copy-pasting stack traces. Let your AI agent read errors directly.

✗ Without MCP Error Hub

See error in browser
Open DevTools, find the error
Copy the stack trace
Switch to IDE, paste into AI chat
Manually describe the context
AI guesses based on incomplete info
Repeat until fixed

✓ With MCP Error Hub

Errors stream automatically to IDE
AI reads full context in real-time
Source files auto-mapped per error
Suggested fixes with exact file paths
Config debug data included
Ask: "Fix error #3" — get a precise answer

Features

Everything you need for real-time error debugging, nothing you don't.

Real-time Streaming

WebSocket primary + HTTP fallback. Errors reach your IDE in under 300ms. Auto-reconnect. sendBeacon on page unload.

Source-Aware Debugging

26 error types auto-mapped to source files. Each error includes relevant file paths and a plain-English suggested fix.

Full State Sync

Reads directly from your Redux store. Same source of truth as your Error Hub UI. Counts are always accurate.

AI-Optimized Prompts

Built-in "diagnose" and "fix_error" prompts. Your AI agent gets structured context, not raw JSON dumps.

Zero Code Setup

Bookmarklet connector. No source code changes. No npm packages to add to your app. One-time drag-and-drop.

Dev-Only by Design

Silent failures. Never affects production. Controlled by environment variables. File-backed store survives restarts.

How it works

Quick Start

Three steps. Under two minutes. Zero code changes to your app.

1

Add MCP server to your IDE

Add this to your IDE's MCP config. The server starts automatically when your IDE launches.

// .cursor/mcp.json or equivalent
{
  "mcpServers": {
    "mcp-error-hub": {
      "command": "npx",
      "args": ["-y", "mcp-error-hub@latest"]
    }
  }
}

2

Connect your browser (zero code)

Open http://localhost:3100 to see the connector dashboard. Drag the "MCP Connect" bookmarklet to your bookmarks bar (one-time). Then navigate to your app page and click the bookmarklet.

[MCP Error Hub] WebSocket connected
[MCP Error Hub] Connected! Errors will sync to your IDE in real-time.

3

Ask your AI agent

Your IDE's AI agent now has full access to your app's runtime errors.

@mcp-error-hub What errors are in the Error Hub?
@mcp-error-hub Diagnose all errors and suggest fixes
@mcp-error-hub Fix error #3
@mcp-error-hub Export debug report in markdown

Works with every MCP-compatible IDE

One server, every editor. Click to see configuration for each IDE.

Cursor .cursor/mcp.json

Create or edit .cursor/mcp.json in your project root:

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

VSCode + Copilot .vscode/mcp.json

Create or edit .vscode/mcp.json in your project root:

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

Claude Code Terminal

Run this command in your terminal:

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

Antigravity Settings UI

Open Settings (three dots) → MCP Servers → Add new server:

Command:   npx
Arguments: -y, mcp-error-hub@latest

Windsurf ~/.codeium/windsurf/mcp_config.json

Add to ~/.codeium/windsurf/mcp_config.json:

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

OpenCode ~/.config/opencode/opencode.json

Add to ~/.config/opencode/opencode.json under the "mcp" key:

{
  "mcp": {
    "mcp-error-hub": {
      "type": "local",
      "command": ["npx", "-y", "mcp-error-hub@latest"],
      "enabled": true
    }
  }
}

Roadmap

Q2 2026

Foundation

Real-time streaming (WebSocket + HTTP)
26 error types with source file mapping
Zero-code bookmarklet connector
Multi-IDE support (6 editors)
File-backed persistent store
AI-optimized prompts

Q3 2026

Intelligence

Console log collection (console.error, console.warn)
Auto-fix code patch generation
Error pattern detection and alerts
Natural language error search
Sentry / Datadog integration

Q4 2026

Collaboration

Team error dashboard
Slack / Teams notifications
Custom error type plugins
Error trend analytics

Q1 2027

Platform

Remote hosted MCP server (OAuth 2.0)
Error replay with state snapshots
Framework adapters (Zustand, MobX, Pinia)
VS Marketplace / JetBrains plugin

Browser errors,meet your IDE