ark-market-data-mcp 0.2.0

MCP server for streaming crypto market data via WebSocket

Ark Market Data MCP

An MCP (Model Context Protocol) server that streams real-time market data to Claude via WebSocket connection.

Features

• Real-time Market Data Streaming - Connects to a WebSocket server and buffers incoming market data
• OHLCV History - Aggregates live stream into 1m/5m candles persisted to a local SQLite database
• Historical Seeding - One-command backfill from Binance (default 6 months, fully configurable)
• MCP Integration - Works seamlessly with Claude via the Model Context Protocol
• Configurable WebSocket URL - Supports environment variable configuration for flexible deployment
• In-memory Buffering - Efficiently buffers up to 500 messages with configurable size
• Auto-reconnect - Automatically reconnects on connection failures with exponential backoff

Installation

Via PyPI

pip install ark-market-data-mcp

From Source

git clone https://github.com/arkhamides/mcp-market-data.git
cd ark-market-data-mcp
python3 -m venv venv
source venv/bin/activate  # On Windows: venv\Scripts\activate
pip install -e .

Quick Start

1. Set up your WebSocket endpoint

export WS_URI=ws://your-websocket-url.com

2. Add to Claude

claude mcp add ark-market-data ark-market-data-mcp

3. Use with Claude

claude chat

Ask Claude to use the market data tools, e.g., "What's the latest market data?"

Seeding Historical Data

Before running backtests, seed the local database with historical candles from Binance.

# Install the historical extra
pip install ark-market-data-mcp[historical]
# or just: pip install ccxt

# Default: BTC/USDT, 1m candles, last 6 months
python scripts/seed_historical.py

# Custom symbol / resolution
python scripts/seed_historical.py --symbol ETH/USDT --resolution 5m

# Custom date range
python scripts/seed_historical.py --start 2024-01-01 --end 2024-07-01

# Custom look-back window
python scripts/seed_historical.py --days 90

# Match your live stream symbol format
python scripts/seed_historical.py --symbol BTC/USDT --store-symbol BTC-USD

Candles are written to ~/.ark-market-data/ohlcv.db (override with DATA_DIR env var). Re-running is safe — existing candles are upserted, so gaps are filled without duplicates.

Available Tools

The MCP server exposes the following tools for Claude:

Real-time stream

• get_latest_message - Get the most recent market message from the stream
• get_recent_messages - Get the last N messages (default: 10, max: 500)
• get_stream_status - Check WebSocket connection status and buffer statistics
• clear_buffer - Clear the message buffer

Order book analysis

• get_market_summary - Best bid/ask, spread, volume imbalance, price change %

Alerts

• set_price_alert - Trigger when a symbol crosses a price threshold
• set_percent_change_alert - Trigger when price moves by a % over N messages
• get_alerts - List all active and triggered alerts

Historical OHLCV

• get_ohlcv - Recent closed candles for a symbol and resolution (1m/5m)
• get_candles_range - Candles between two Unix timestamps

Backtesting

• run_backtest - Simulate a trading strategy against historical candles; returns P&L, max drawdown, and full trade log

Connecting for the users of the app

Remote server connection

https://mcp-market-data.com/mcp?api=YOUR_API_KEY

Local server connection

source venv/bin/activate

# Defaults to stdio
python3 -m ark_market_data_mcp

# Explicitly use stdio
python3 -m ark_market_data_mcp stdio

# Use HTTP transport (Docker, remote clients)
python3 -m ark_market_data_mcp http

Development

Test with MCP Inspector

# Terminal 1: Start the server
source venv/bin/activate
WS_URI=ws://your-websocket-url.com python3 -m ark_market_data_mcp

# Terminal 2: Open the MCP Inspector
npx @modelcontextprotocol/inspector

Open http://localhost:5173 in your browser to test tools and messages.

Run tests

pytest

Architecture

┌─────────────────────────┐
│     Claude (User)       │
└────────────┬────────────┘
             │
             │ (via stdio)
             │
┌────────────▼────────────┐
│   MCP Server (Python)   │
│  - Listens on stdio     │
│  - Exposes tools        │
└────────────┬────────────┘
             │
             │ (WebSocket)
             │
┌────────────▼───────────────┐
│   Ark Market Data Server   │
│    (Remote WebSocket)      │
└────────────────────────────┘

Troubleshooting

Connection Refused

If you see "Connection refused" errors:

• Ensure your WebSocket server is running
• Verify the WS_URI environment variable is set correctly
• Check firewall settings if using a remote server

No Messages Received

• Verify the WebSocket server is sending data in the expected format
• Check the logs: they show all incoming messages
• Use the get_stream_status tool to verify connection status

MCP Tools Not Showing Up

• Restart Claude after adding the MCP
• Check that the server starts without errors
• Verify the MCP was added correctly: claude mcp list

License

MIT

Author

arkhamides