io.github.blocklens/blocklens-mcp-server

blocklens-mcp-server

MCP (Model Context Protocol) server for Blocklens Bitcoin on-chain analytics. Connect your AI agent to 127 on-chain metrics computed from raw blockchain data — no API wrappers, no delays.

Quick Start

Remote Access (No Install)

Connect directly to the hosted endpoint — no packages, no local setup:

Claude.ai (Browser): Settings → Connectors → Add → URL: https://mcp.blocklens.co

Claude Desktop / Cursor / Windsurf (via mcp-remote):

{
  "mcpServers": {
    "blocklens": {
      "command": "npx",
      "args": ["mcp-remote", "https://mcp.blocklens.co"]
    }
  }
}

Any MCP HTTP client: POST to https://mcp.blocklens.co (Streamable HTTP transport)

Local Install

Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "blocklens": {
      "command": "npx",
      "args": ["-y", "blocklens-mcp-server"],
      "env": {
        "BLOCKLENS_API_KEY": "blk_your_key_here"
      }
    }
  }
}

Config file location:

• macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
• Windows: %APPDATA%\Claude\claude_desktop_config.json

Cursor / Windsurf

Add to your MCP config (.cursor/mcp.json):

{
  "blocklens": {
    "command": "npx",
    "args": ["-y", "blocklens-mcp-server"],
    "env": {
      "BLOCKLENS_API_KEY": "blk_your_key_here"
    }
  }
}

Demo Mode (No API Key)

Works without an API key — you get 60 days of history for basic-tier metrics. Get an API key at blocklens.co/api-keys for full access.

Available Tools (15)

Metrics Coverage (127 total)

Market Data (27 metrics)

Price, OHLC, volume, market cap, drawdown from ATH, 6 realized volatility windows (1W, 2W, 1M, 3M, 6M, 1Y), cycle performance, and individual cycle tracks from lows, ATHs, and halvings.

Supply (16 metrics)

Circulating supply, LTH/STH supply, cost basis distribution heatmap, and 12 age cohort supplies (<24h through 10y+) for HODL Waves analysis.

Valuation (41 metrics)

Realized cap, realized price, MVRV (aggregate + LTH/STH), thermo cap, delta cap, average cap, balanced price, investor cap, market cap/thermo cap ratio, and 24 age cohort realized prices and caps.

Profitability (12 metrics)

NUPL, unrealized/realized P/L, SOPR — each with aggregate, LTH, and STH breakdowns.

Coin Days (11 metrics)

Coin Days Destroyed (CDD), binary CDD, supply-adjusted CDD, liveliness, vaultedness, dormancy, dormancy flow, net coin days, coin days accumulated, transferred price, transfer volume.

ETF Analytics (11 metrics)

Total BTC holdings, AUM, net/cumulative flows, cumulative money flow, ETF realized price, US Spot ETF realized price, US Spot cumulative money flow, BTC dominance, US BTC holdings, ETF premium average.

Blockchain (2 metrics)

Block height, blocks mined.

Chart Rendering

The render_chart tool generates PNG charts inline in the conversation.

Quick examples:

render_chart({ metric: "price", days: 365 })
render_chart({ template: "mvrv_ratio" })
render_chart({ metrics: ["lth_supply", "sth_supply"], style: "area" })
render_chart({ metric: "dormancy_flow", overlay: "price" })
render_chart({ template: "realized_volatility", days: 730 })

Annotations — reference lines and areas:

render_chart({
  metric: "lth_mvrv",
  reference_lines: [
    { "y": 3.5, "label": "Overheated", "stroke": "#ef4444", "dash": "3 3" }
  ],
  reference_areas: [
    { "y1": 0, "y2": 0.85, "label": "Undervalued", "fill": "#22c55e", "fill_opacity": 0.15 }
  ]
})

Example Prompts

• "What's Bitcoin's current MVRV ratio and what does it say about valuation?"
• "Show me realized volatility — is short-term vol higher than long-term?"
• "Chart dormancy flow with price overlay for the last 2 years"
• "Compare LTH and STH supply trends over 90 days"
• "Are long-dormant coins waking up? Check liveliness and CDD"
• "Show cycle performance from each halving — are we tracking historical patterns?"
• "What's the current NUPL level? Is the market in euphoria or fear?"

Access Tiers

Links

• Remote MCP Endpoint
• Blocklens
• Full Documentation
• Metrics Reference
• API Reference
• Get API Key
• MCP Protocol

License

MIT