nanobot-webbridge-plugin 1.2.0

WebBridge channel plugin for nanobot - universal web interface

nanobot-webbridge-plugin

🎉 WebBridge channel plugin for nanobot — Enables a beautiful web chat interface with streaming responses for your AI agent!

This plugin adds a WebSocket server to nanobot that accepts connections from agent-webbridge, providing a universal web frontend.

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Architecture

┌─────────────────────┐          ┌─────────────────────┐          ┌─────────────────────┐
│   agent-webbridge  │◄────────►│   nanobot (with     │◄────────►│   AI Agent (LLM)    │
│   (Web Frontend)   │  wss    │   webbridge plugin) │  json    │                     │
│   port 8080        │          │   port 18791       │          │                     │
└─────────────────────┘          └─────────────────────┘          └─────────────────────┘
         │                                                                              │
         │  User's Browser                                                             │
         └──────────────────────────────────────────────────────────────────────────────┘

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Features

• 🔐 Secure — API Key + HMAC + IP whitelist
• 🌐 Universal — Works with any WebSocket agent (nanobot, openclaw, etc.)
• 💬 Real-time Streaming — Responses appear word by word as AI generates them
• 📎 File Upload — Images, PDFs, documents
• 🎨 Modern UI — Dark-themed, responsive design
• 🔄 Auto-reconnect — Automatic reconnection on disconnect
• 📱 Responsive — Works on desktop and mobile

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Streaming Configuration

The plugin supports real-time streaming of AI responses. Messages are sent as chunks for a natural feel.

{
  "channels": {
    "webbridge": {
      "enabled": true,
      "streaming": true,
      "stream_chars_per_second": 100,
      "host": "0.0.0.0",
      "port": 18791,
      "allowed_connections": [...]
    }
  }
}

Setting	Type	Default	Description
streaming	boolean	true	Enable/disable streaming
stream_chars_per_second	integer	100	Speed of streaming (chars per second)

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Prerequisites

• nanobot installed and running
• Python 3.10+
• agent-webbridge frontend (see agent-webbridge)

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Installation

1. Install the plugin

# Using pip
pip install nanobot-webbridge-plugin

# Or from source
git clone https://github.com/ramonpaolo/nanobot-webbridge-plugin.git
cd nanobot-webbridge-plugin
pip install -e .

2. Configure nanobot

Edit your ~/.nanobot/config.json:

{
  "channels": {
    "webbridge": {
      "enabled": true,
      "host": "0.0.0.0",
      "port": 18791,
      "hmac_secret": "",           // Optional: for message signatures
      "allowed_connections": [
        {
          "api_key": "sk_live_your_unique_api_key_here",
          "ip": null               // null = any IP, or "192.168.1.100" for specific IP
        }
      ]
    }
  }
}

3. Generate a secure API Key

# Generate a 32-character random key
openssl rand -hex 16

# Example output: 4a7b9c2e1f3d8h6i0jklmnopqrstuvwx

4. Restart nanobot

# If using systemd
systemctl --user restart nanobot

# If using PM2
pm2 restart nanobot

# If running directly
nanobot run

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Frontend Setup

Now set up the agent-webbridge frontend:

git clone https://github.com/ramonpaolo/webbridge-agent.git
cd webbridge-agent
cp .env.example .env

Edit .env:

API_KEY=sk_live_your_unique_api_key_here    # Must match nanobot config
AGENT_WS_URL=ws://localhost:18791           # nanobot webbridge URL
HMAC_SECRET=                                # Leave empty if not using HMAC
AGENT_NAME=My Agent

Run:

pip install -r requirements.txt
uvicorn src.main:app --reload --port 8080

Open http://localhost:8080 in your browser.

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Security

Security Layers

Layer	Description
API Key	Required for WebSocket handshake
IP Whitelist	Optional per-API-key IP restriction
HMAC Signature	Optional message integrity verification

IP Whitelist

Restrict access to specific IPs:

"allowed_connections": [
  {
    "api_key": "sk_live_...",
    "ip": "192.168.1.100"    // Only this IP can use this key
  },
  {
    "api_key": "sk_live_...",
    "ip": null               // Any IP can use this key
  }
]

HMAC Signatures (Optional)

For extra security, enable HMAC signatures:

1. Set the same hmac_secret in both nanobot config and agent-webbridge .env
2. Messages will include a signature verified by both sides

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Configuration Reference

nanobot config.json

{
  "channels": {
    "webbridge": {
      "enabled": true,                      // true to enable
      "host": "0.0.0.0",                   // Interface to bind
      "port": 18791,                        // WebSocket port
      "hmac_secret": "",                   // Optional HMAC secret
      "allowed_connections": [              // Required: at least one
        {
          "api_key": "sk_live_...",        // Your API key
          "ip": null                        // IP whitelist (null = any)
        }
      ]
    }
  }
}

agent-webbridge .env

API_KEY=sk_live_your_unique_api_key_here    # Required
AGENT_WS_URL=ws://localhost:18791           # Required
HMAC_SECRET=                                 # Optional
AGENT_NAME=My Agent                         # Optional
PORT=8080                                    # Optional
ALLOWED_ORIGINS=*                           # Optional

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Troubleshooting

"Access denied" error

1. Verify api_key matches exactly in both configs
2. Check that allowed_connections is not empty
3. If using IP whitelist, verify your IP is allowed

"Connection refused" error

1. Ensure nanobot is running with webbridge enabled
2. Check that AGENT_WS_URL in agent-webbridge .env is correct
3. Verify no firewall is blocking the ports

Messages not being received

1. Check nanobot logs for message processing errors
2. Verify the agent is configured to respond on the webbridge channel

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Development

# Clone the repo
git clone https://github.com/ramonpaolo/nanobot-webbridge-plugin.git
cd nanobot-webbridge-plugin

# Install in development mode
pip install -e .

# Run tests
pytest tests/ -v

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License

MIT © ramonpaolo