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21btc.cc Bitcoin Data

MCP server · hosted · v1.1.0 · cc.21btc/bitcoin-data
Online · tested 3h agoNEW · 4h agoNew version 4h agoSeen in the registry 3h ago

Live Bitcoin price, ETF flows, treasuries, on-chain metrics, fees, derivatives & wiki search.

Website ↗How to connect ↓

What it does

21btc.cc Bitcoin Data is an MCP server, a connector that lets an AI assistant use it as a tool. It is hosted: an assistant connects to it over the internet, nothing to install.

No capability identified yet from its description.

Facts come from the Official MCP Registry, as declared by the publisher. Capabilities are matched automatically (low confidence). None of this is a test of the tool.

At a glance

Hosted (remote)YES
Local installNO
Version1.1.0
PriceNot in the registry
First seen28 Oct 2026
Last checked3h ago

How to connect

As declared in the Official MCP Registry · hosted endpoint tested by Electra Index 3h ago (live check)

Hosted endpoint

  • https://21btc.cc/mcp streamable-http

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

MCP settings (Claude Desktop, Cursor and other MCP clients)

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

Live check

Electra Index connected to the hosted endpoint 3h ago

ONLINE 21btc.cc Bitcoin Data answered an MCP connection on 28 Oct 2026 and introduced itself as 21btc-cc 1.1.0 (MCP protocol 2025-06-18).

14 tools offered to AI assistants

  • 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, c
  • 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.
Show 2 more
  • 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.

What "online" means: the server answered an MCP connection at the time of the check. It is not a guarantee of security, quality or continuous uptime. How we test: we open an MCP session and ask for the tool list, as an AI assistant would. We never run a tool and never send a key. Checked every few days. Method

Is this your server? Monitoring Pro: a check every 30 minutes and an email within the hour when it stops answering. Launch offer: $39.99 once, for life.

Facts & evidence

Each fact shows where it was seen and when.
FactValueEvidenceSourceLast confirmed
Version1.1.0DECLAREDSRC-001 Official MCP Registry3h ago
Hosted endpointhttps://21btc.cc/mcpDECLAREDSRC-001 Official MCP Registry3h ago
Local install (package)noDECLAREDSRC-001 Official MCP Registry3h ago
Remote access (hosted)yesDECLAREDSRC-001 Official MCP Registry3h ago
Websitehttps://21btc.cc/mcpDECLAREDSRC-001 Official MCP Registry3h ago
Registry statusactiveDECLAREDSRC-001 Official MCP Registry3h ago
MCP serveryesDECLAREDSRC-001 Official MCP Registry3h ago

Change history

  • VERSION28 Oct 2026
    1.0.0 → 1.1.0
  • NEW28 Oct 2026
    first seen in the index

Is this page accurate?

Flag it and our robot re-checks the official source. Reports never change a score.

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For publishers · optional

Its hosted endpoint can be monitored. Monitoring Pro connects every 30 minutes like an AI assistant, emails you within the hour when it stops answering, keeps a 90-day availability history and adds your answer rate to your badge.

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Questions about 21btc.cc Bitcoin Data

How do I connect 21btc.cc Bitcoin Data?

Use the hosted endpoint https://21btc.cc/mcp in your assistant's MCP settings. The exact settings are in "How to connect" above, as declared in the Official MCP Registry.

What tools does 21btc.cc Bitcoin Data offer?

When Electra Index connected on 28 Oct 2026, it listed 14 tools: get_price, get_etf_flows, get_risk_score, get_volatility, get_holders, get_rainbow_model, get_stock_to_flow, get_network_stats and more. The full list is in "Live check" above.

Is 21btc.cc Bitcoin Data online?

Yes. Its hosted endpoint answered an MCP connection from Electra Index 3h ago.