aqua-mcp 0.2.0

MCP server for Liquid Network wallet operations

💧 AQUA MCP

MCP server for managing Liquid Network and Bitcoin wallets through AI assistants like Claude. One mnemonic can back both networks (unified wallet).

Features

• 🔑 Generate & Import - Create new wallets or import existing mnemonics
• 🔗 Unified Wallet - One mnemonic for Liquid and Bitcoin; unified_balance shows both
• ₿ Bitcoin (onchain) - BIP84 wallets, balance and send via btc_* tools (BDK)
• 👀 Watch-Only - Import CT descriptors for balance monitoring
• 💸 Send & Receive - Full transaction support (L-BTC, BTC, and Liquid assets)
• 🪙 Assets - Native support for L-BTC, USDT, and all Liquid assets
• 🔒 Secure - Encrypted storage, no remote servers for keys

Installation

For End Users (Easiest!)

If you don't have uvx installed:

# macOS/Linux
curl -LsSf https://astral.sh/uv/install.sh | sh

# Windows
powershell -c "irm https://astral.sh/uv/install.ps1 | iex"

Then configure Claude Desktop (~/.claude/claude_desktop_config.json):

{
  "mcpServers": {
    "aqua-mcp": {
      "command": "/full/path/to/uvx",
      "args": ["aqua-mcp"]
    }
  }
}

Important: You can use the full path to uvx because Claude Desktop (macOS GUI app) doesn't inherit your shell's PATH. Find it with:

which uvx
# Example output: /Users/yourname/.local/bin/uvx

Restart Claude Desktop and you're ready to use Liquid wallets.

For Developers

Clone and install from source:

git clone https://github.com/jan3dev/aqua-mcp.git
cd aqua-mcp
uv sync

Configure Claude Desktop. Use the full path to uv (e.g. which uv) so the app finds it:

{
  "mcpServers": {
    "aqua-mcp": {
      "command": "/full/path/to/uv",
      "args": ["run", "--directory", "/absolute/path/to/aqua-mcp", "python", "-m", "aqua_mcp.server"]
    }
  }
}

Quick Start

Use with Claude

Once connected, you can ask Claude to:

• "Create a new Liquid wallet" (also creates Bitcoin wallet from same mnemonic)
• "Show me my L-BTC balance" / "What's my Bitcoin balance?"
• "Show my unified balance (Bitcoin and Liquid)"
• "Generate a new receive address" (Liquid or Bitcoin)
• "Send 0.001 L-BTC to lq1..." / "Send 10,000 sats to bc1..."

Usage Examples

Create a New Wallet

User: Create a new Liquid wallet for me

Claude: I'll generate a new wallet for you.
[Uses lw_generate_mnemonic → lw_import_mnemonic]

Your new wallet has been created!
Mnemonic (SAVE THIS SECURELY):
  abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon about

⚠️ Write this down and store it safely. Anyone with these words can access your funds.

Check Balance

User: What's my Liquid balance?

Claude: [Uses lw_balance]

Your balances:
- L-BTC: 0.00100000 (100,000 sats)
- USDT: 50.00

Send Transaction

User: Send 50,000 sats to lq1qqw8...

Claude: [Uses lw_send]

Transaction sent!
TXID: 7f3a8b2c...
Fee: 250 sats

Available Tools

Liquid (lw_*)

Tool	Description
lw_generate_mnemonic	Generate new BIP39 mnemonic
lw_import_mnemonic	Import wallet from mnemonic (also creates Bitcoin wallet)
lw_import_descriptor	Import watch-only wallet
lw_export_descriptor	Export CT descriptor
lw_balance	Get wallet balances (all assets)
lw_address	Generate Liquid receive address
lw_send	Send L-BTC
lw_send_asset	Send any Liquid asset
lw_transactions	Transaction history
lw_tx_status	Get transaction status (txid or explorer URL)
lw_list_wallets	List all wallets

Bitcoin (btc_*)

Tool	Description
btc_balance	Get Bitcoin balance (sats)
btc_address	Generate Bitcoin receive address (bc1...)
btc_transactions	Bitcoin transaction history
btc_send	Send BTC

Unified

Tool	Description
unified_balance	Get balance for both Bitcoin and Liquid

Configuration

Default config location: ~/.aqua-mcp/config.json

{
  "network": "mainnet",
  "default_wallet": "default",
  "electrum_url": null,
  "auto_sync": true
}

Networks

• Liquid: mainnet (real funds), testnet (test funds) — Electrum/Esplora (Blockstream)
• Bitcoin: mainnet, testnet — Esplora (Blockstream)

Security

Mnemonic Storage

Mnemonics are encrypted at rest using a passphrase. On first use, you'll be prompted to set a passphrase.

Watch-Only Mode

For maximum security, you can:

1. Generate wallet on an air-gapped device
2. Export the CT descriptor
3. Import as watch-only on your daily machine
4. Sign transactions on the air-gapped device

No Remote Keys

All private key operations happen locally. Only blockchain sync uses Blockstream's public servers.

Development

# Install with dev dependencies
uv sync --all-extras

# Run tests
uv run python -m pytest tests/

# Format code
uv run black src/
uv run ruff check src/

Architecture

┌─────────────────┐     ┌─────────────────┐     ┌─────────────────┐
│  AI Assistant   │────▶│   MCP Server    │────▶│   LWK (Liquid)  │───▶ Electrum/Esplora
│  (Claude, etc)  │     │   (Python)      │     └─────────────────┘
└─────────────────┘     └────────┬────────┘     ┌─────────────────┐
                                 │              │   BDK (Bitcoin) │───▶ Esplora
                                 └──────────────└─────────────────┘     (Blockstream)

Credits

Built with:

• LWK - Liquid Wallet Kit by Blockstream
• BDK - Bitcoin Development Kit
• MCP - Model Context Protocol