🧰 Agent Toolbox

REST API + MCP Server giving AI agents real-world superpowers

Web search · Content extraction · Screenshots · Weather · Finance · Email validation · Translation

What is Agent Toolbox?

Agent Toolbox is a 7-endpoint API and MCP server that gives AI agents access to real-world data and actions — web search, page scraping, screenshots, weather, finance, email validation, and translation. Zero AI cost: all endpoints use free, open-source backends.

Use it as:

• 🔌 MCP Server — plug into Claude Desktop, Cursor, Windsurf, or any MCP-compatible client
• 🌐 REST API — call from any language, any framework, any agent
• 🐳 Self-hosted — run on your own infrastructure with full control

Quick Start

Option 1: MCP Server (Recommended for Claude/Cursor)

# Clone and build
git clone https://github.com/Vincentwei1021/agent-toolbox.git
cd agent-toolbox
npm install
npx playwright install chromium --with-deps
npm run build

Claude Desktop Configuration

Add to ~/Library/Application Support/Claude/claude_desktop_config.json:

{
  "mcpServers": {
    "agent-toolbox": {
      "command": "node",
      "args": ["/absolute/path/to/agent-toolbox/dist/mcp-server.js"],
      "env": {}
    }
  }
}

Cursor Configuration

Add to .cursor/mcp.json in your project root:

{
  "mcpServers": {
    "agent-toolbox": {
      "command": "node",
      "args": ["/absolute/path/to/agent-toolbox/dist/mcp-server.js"]
    }
  }
}

Windsurf / Continue / Other MCP Clients

{
  "mcpServers": {
    "agent-toolbox": {
      "command": "node",
      "args": ["/absolute/path/to/agent-toolbox/dist/mcp-server.js"]
    }
  }
}

Option 2: REST API (Self-hosted)

git clone https://github.com/Vincentwei1021/agent-toolbox.git
cd agent-toolbox
npm install
npx playwright install chromium --with-deps

# Configure
cp .env.example .env
# Edit .env with your settings

# Build and run
npm run build
npm start
# → API running at http://localhost:3100

Option 3: npm (coming soon)

npx @agent-toolbox/mcp-server

MCP Server

The MCP server exposes 7 tools over stdio, compatible with the Model Context Protocol:

Example: Claude Desktop using Agent Toolbox

User: What's the weather in Tokyo and take a screenshot of the forecast?

Claude: I'll check the weather and capture a screenshot for you.

[Using agent-toolbox:weather] → Tokyo: 12°C, Clear skies, Wind 15 km/h
[Using agent-toolbox:screenshot] → Captured screenshot of weather.com/tokyo

REST API Endpoints

All endpoints require Bearer authentication (except /health and /v1/docs).

Authorization: Bearer your-api-key

POST /v1/search

Search the web via DuckDuckGo. Returns titles, URLs, and snippets.

curl -X POST https://api.agenttoolbox.dev/v1/search \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"query": "best AI agent frameworks 2025", "count": 5}'

{
  "success": true,
  "data": [
    {
      "title": "Top AI Agent Frameworks in 2025",
      "url": "https://example.com/ai-frameworks",
      "snippet": "A comprehensive comparison of the leading AI agent frameworks..."
    }
  ],
  "meta": {
    "requestId": "a1b2c3d4",
    "latencyMs": 420,
    "endpoint": "/v1/search"
  }
}

POST /v1/extract

Extract readable content from any web page. Supports markdown, text, and JSON output.

curl -X POST https://api.agenttoolbox.dev/v1/extract \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"url": "https://example.com", "format": "markdown"}'

{
  "success": true,
  "data": {
    "content": "# Example Domain\n\nThis domain is for use in illustrative examples...",
    "metadata": {
      "title": "Example Domain",
      "length": 1234,
      "excerpt": "This domain is for use in illustrative examples..."
    }
  },
  "meta": {
    "requestId": "e5f6g7h8",
    "latencyMs": 850,
    "endpoint": "/v1/extract"
  }
}

POST /v1/screenshot

Capture a full-page screenshot using headless Chromium. Returns base64-encoded PNG.

curl -X POST https://api.agenttoolbox.dev/v1/screenshot \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"url": "https://example.com", "width": 1280, "height": 720}'

{
  "success": true,
  "data": {
    "base64": "iVBORw0KGgoAAAANSUhEUg...",
    "width": 1280,
    "height": 720,
    "format": "png"
  },
  "meta": {
    "requestId": "i9j0k1l2",
    "latencyMs": 2100,
    "endpoint": "/v1/screenshot"
  }
}

POST /v1/weather

Get current weather and forecasts from Open-Meteo (free, no API key needed).

curl -X POST https://api.agenttoolbox.dev/v1/weather \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"location": "San Francisco"}'

{
  "success": true,
  "data": {
    "location": "San Francisco, California, United States",
    "current": {
      "temperature": 15.2,
      "feelsLike": 13.8,
      "humidity": 72,
      "description": "Partly cloudy",
      "windSpeed": 18.5
    },
    "forecast": [
      { "date": "2026-03-03", "high": 17.0, "low": 10.2, "description": "Partly cloudy" }
    ]
  },
  "meta": {
    "requestId": "m3n4o5p6",
    "latencyMs": 310,
    "endpoint": "/v1/weather"
  }
}

POST /v1/finance

Get real-time stock quotes and currency exchange rates via Yahoo Finance.

# Stock quote
curl -X POST https://api.agenttoolbox.dev/v1/finance \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"symbol": "AAPL", "type": "quote"}'

# Exchange rate
curl -X POST https://api.agenttoolbox.dev/v1/finance \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"from": "USD", "to": "EUR", "amount": 100}'

{
  "success": true,
  "data": {
    "symbol": "AAPL",
    "name": "Apple Inc.",
    "price": 178.52,
    "change": 2.35,
    "changePercent": 1.33,
    "currency": "USD"
  },
  "meta": {
    "requestId": "q7r8s9t0",
    "latencyMs": 450,
    "endpoint": "/v1/finance"
  }
}

POST /v1/validate-email

Validate email addresses with syntax check, MX record lookup, SMTP handshake, and disposable domain detection. Zero cost — no external APIs.

curl -X POST https://api.agenttoolbox.dev/v1/validate-email \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"email": "test@gmail.com"}'

{
  "success": true,
  "data": {
    "email": "test@gmail.com",
    "valid_syntax": true,
    "mx_found": true,
    "mx_records": [
      { "exchange": "gmail-smtp-in.l.google.com", "priority": 5 }
    ],
    "smtp_reachable": true,
    "smtp_response": "250 2.1.5 OK",
    "is_disposable": false,
    "score": 0.95,
    "verdict": "deliverable"
  },
  "meta": {
    "requestId": "u1v2w3x4",
    "latencyMs": 1200,
    "endpoint": "/v1/validate-email"
  }
}

Verdicts: deliverable | risky | undeliverable | invalid

POST /v1/translate

Translate text between 100+ languages with auto-detection, Markdown preservation, glossary support, and batch processing. Free.

# Single text
curl -X POST https://api.agenttoolbox.dev/v1/translate \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"text": "Hello, how are you?", "target": "zh"}'

# Batch translation
curl -X POST https://api.agenttoolbox.dev/v1/translate \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"texts": ["Hello", "Goodbye"], "target": "ja"}'

# With glossary (terms preserved as-is)
curl -X POST https://api.agenttoolbox.dev/v1/translate \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"text": "The API endpoint returns JSON.", "target": "zh", "glossary": {"API": "API", "JSON": "JSON"}}'

{
  "success": true,
  "data": {
    "text": "Hello, how are you?",
    "translation": "你好，你好吗？",
    "detectedLanguage": { "code": "en", "confidence": 0.98 },
    "target": "zh"
  },
  "meta": {
    "requestId": "y5z6a7b8",
    "latencyMs": 180,
    "endpoint": "/v1/translate"
  }
}

{
  "success": true,
  "data": {
    "translations": [
      { "text": "Hello", "translation": "こんにちは", "detectedLanguage": { "code": "en", "confidence": 1.0 }, "target": "ja" },
      { "text": "Goodbye", "translation": "さようなら", "detectedLanguage": { "code": "en", "confidence": 1.0 }, "target": "ja" }
    ],
    "target": "ja"
  },
  "meta": {
    "requestId": "c9d0e1f2",
    "latencyMs": 350,
    "endpoint": "/v1/translate"
  }
}

Parameters: text | texts (max 20) | target (required, ISO 639-1) | source (default: auto) | glossary (optional)

Utility Endpoints

Environment Variables

Pricing

Tech Stack

• Runtime: Node.js 18+
• Framework: Hono (ultrafast web framework)
• MCP SDK: @modelcontextprotocol/sdk
• Browser: Playwright (Chromium)
• Search: DuckDuckGo (free, no API key)
• Weather: Open-Meteo (free, no API key)
• Finance: Yahoo Finance
• Translation: Google Translate (free)
• Email: Native DNS + SMTP + disposable-email-domains
• Database: SQLite (better-sqlite3)
• Payments: Creem (Merchant of Record)

Production Deployment

# Using PM2
npm install -g pm2
npm run build
pm2 start ecosystem.config.js

Contributing

Issues and PRs welcome. Please open an issue first to discuss what you'd like to change.

License

MIT