21btc.cc Bitcoin Data

Name: 21btc.cc Bitcoin Data
Author: cc.21btc

MCP serverMCP

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

by cc.21btchomepage ↗v1.1.0

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Observed by Wellknown

Evidence

Everything here was measured by our prober or read from a registry. Nothing is self-reported.

30-day availability13/13 checks ok

when	check	result	http	latency	detail
2 h ago	mcp initialize	ok	200	22 ms	server 21btc-cc 1.1.0 · protocol 2025-06-18 · 14 tools
11 h ago	mcp initialize	ok	200	16 ms	server 21btc-cc 1.1.0 · protocol 2025-06-18 · 14 tools
19 h ago	mcp initialize	ok	200	16 ms	server 21btc-cc 1.1.0 · protocol 2025-06-18 · 14 tools
27 h ago	mcp initialize	ok	200	18 ms	server 21btc-cc 1.1.0 · protocol 2025-06-18 · 14 tools
35 h ago	mcp initialize	ok	200	17 ms	server 21btc-cc 1.1.0 · protocol 2025-06-18 · 14 tools
2 d ago	mcp initialize	ok	200	14 ms	server 21btc-cc 1.1.0 · protocol 2025-06-18 · 14 tools
2 d ago	mcp initialize	ok	200	19 ms	server 21btc-cc 1.1.0 · protocol 2025-06-18 · 14 tools
3 d ago	mcp initialize	ok	200	20 ms	server 21btc-cc 1.1.0 · protocol 2025-06-18 · 14 tools
3 d ago	mcp initialize	ok	200	75 ms	server 21btc-cc 1.1.0 · protocol 2025-06-18 · 14 tools
3 d ago	mcp initialize	ok	200	15 ms	server 21btc-cc 1.1.0 · protocol 2025-06-18 · 14 tools

Tools observed via MCP handshake

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:
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 op
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: BitInfo
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,
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 wher
get_changelog — Recent shipped changes to 21btc.cc with dates and links. Same data as the /changelog page and its RSS feed. Read-only.

Declared by sources

What the publisher says

Attributed to the source that supplied each field. Treated as claims, not facts.

No long description beyond the summary.

kind Official MCP Registry

name Official MCP Registry

summary Official MCP Registry

version Official MCP Registry

description Official MCP Registry

homepageUrl Official MCP Registry

publisherName Official MCP Registry

Provenance

Where this record came from

Every source is kept verbatim. Field changes are logged as events.

Official MCP Registrycc.21btc/bitcoin-data

first seen 4 d ago · fetched 12 h agoopen ↗

Field history (6 recent events)

4 d ago · declared · summary → "Live Bitcoin price, ETF flows, treasuries, on-chain metrics, fees, derivatives & wiki search."
4 d ago · declared · description → "Live Bitcoin price, ETF flows, treasuries, on-chain metrics, fees, derivatives & wiki search."
4 d ago · declared · publisherName → "cc.21btc"
4 d ago · declared · homepageUrl → "https://21btc.cc/mcp"
4 d ago · declared · version → "1.1.0"
4 d ago · declared · protocols → ["mcp"]

This record is unclaimed

Evidence

What the publisher says

Capabilities

Where this record came from