21btc.cc Bitcoin Data

Connect Remote server

claude mcp add --transport http bitcoin-data https://21btc.cc/mcp

{
  "mcpServers": {
    "bitcoin-data": {
      "url": "https://21btc.cc/mcp"
    }
  }
}

{
  "servers": {
    "bitcoin-data": {
      "type": "http",
      "url": "https://21btc.cc/mcp"
    }
  }
}

Settings > Connectors > Add custom connector
URL: https://21btc.cc/mcp

Tools 14 found in our last check

• get_price

  Live BTC price in USD and 7 other currencies (official FX reference rates). Same data as GET /api/v1/price. Read-only.

• get_etf_flows

  US spot Bitcoin ETFs: BTC held, fee, latest/5d/20d/cumulative flows (USD millions). Same data as GET /api/v1/etf. Read-only.

• get_risk_score

  Risk On/Off composite score (0–100) with every input, formula and source. Same data as GET /api/v1/risk. Read-only.

• get_volatility

  Annualised realised volatility over 7/30/90/365 days and by year. Same data as GET /api/v1/volatility. Read-only.

• get_holders

  Bitcoin holders: companies, funds, governments (BTC, 7-day change). Same data as GET /api/v1/holders. Read-only.

• get_rainbow_model

  Rainbow model fit parameters and today's deviation (a model, not a forecast). Same data as GET /api/v1/rainbow. Read-only.

• get_stock_to_flow

  Stock-to-flow ratio and PlanB 2019 model value (a model, not a forecast). Same data as GET /api/v1/stock-to-flow. Read-only.

• get_network_stats

  Bitcoin network now: block height, hashrate (EH/s), difficulty and the next difficulty adjustment, mempool size, average block time, halving countdown. Sources: mempool.space, blockchain.info, Blockchair. Read-only.

• get_fees

  Recommended Bitcoin transaction fees in sat/vB (fastest, 30 minutes, 1 hour, economy, minimum) and mempool size, from mempool.space. Read-only.

• get_derivatives

  BTC perpetual futures on Binance, Bybit, OKX and Deribit: open interest (BTC and USD), mark price, funding rate per interval and annualised, a 30-day Binance open interest history and recent OKX liquidations. Public keyless exchange APIs, cached 60 seconds. Liquidations cover on…

• get_holder_distribution

  How many Bitcoin addresses hold at least 0.1, 1, 10, 100, 1,000 and 10,000 BTC and how coins split across holder classes. Addresses, not people. Source: BitInfoCharts and four cross-checks, with an as-of date. Read-only.

• search_site

  Search the site's pages, Bitcoin glossary terms, wiki articles, blog posts, videos, pools, wallets and hacks. Matches English and Russian. Returns title, kind, URL and a short summary. Use kind=glossary for definitions. Read-only.

• get_events

  Upcoming Bitcoin-only conferences with dates, city, official URL, ticket offer (price only where verified on the official page) and the 21btc.cc event page where one exists. Dates in the venue's local time. Read-only.

• get_changelog

  Recent shipped changes to 21btc.cc with dates and links. Same data as the /changelog page and its RSS feed. Read-only.

Details

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