21btc.cc Bitcoin Data

Server Details

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

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Status: Healthy
Last Tested: 2026-10-28 16:23
Transport: Streamable HTTP · MCP 2025-11-25
URL

TDQS

Score is being calculated.

Available Tools

14 tools

get_changelogSite changelog

Read-onlyIdempotent

Inspect

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

Name	Required	Description	Default
`limit`	No

get_derivativesBitcoin derivatives: open interest, funding, liquidations

Read-onlyIdempotent

Inspect

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 one exchange only; no free all-exchange total exists. Not advice. Read-only.

Name	Required	Description	Default
No parameters

get_etf_flowsSpot Bitcoin ETF flows

Read-onlyIdempotent

Inspect

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

Name	Required	Description	Default
No parameters

get_eventsUpcoming Bitcoin conferences and events

Read-onlyIdempotent

Inspect

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.

Name	Required	Description	Default
`limit`	No
`country`	No	Filter by country name in English, e.g. Switzerland

get_feesBitcoin transaction fees

Read-onlyIdempotent

Inspect

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

Name	Required	Description	Default
No parameters

get_holder_distributionBitcoin addresses by balance (shrimp to humpback)

Read-onlyIdempotent

Inspect

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.

Name	Required	Description	Default
No parameters

get_holdersBitcoin holders: companies, funds, governments

Read-onlyIdempotent

Inspect

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

Name	Required	Description	Default
No parameters

get_network_statsBitcoin network stats

Read-onlyIdempotent

Inspect

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.

Name	Required	Description	Default
No parameters

get_priceBitcoin price

Read-onlyIdempotent

Inspect

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

Name	Required	Description	Default
No parameters

get_rainbow_modelRainbow model (a model, not a forecast)

Read-onlyIdempotent

Inspect

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

Name	Required	Description	Default
No parameters

get_risk_scoreRisk On/Off score

Read-onlyIdempotent

Inspect

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

Name	Required	Description	Default
No parameters

get_stock_to_flowStock-to-flow model (a model, not a forecast)

Read-onlyIdempotent

Inspect

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.

Name	Required	Description	Default
No parameters

get_volatilityBitcoin volatility

Read-onlyIdempotent

Inspect

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

Name	Required	Description	Default
No parameters

search_siteSearch 21btc.cc (pages, glossary, wiki, blog)

Read-onlyIdempotent

Inspect

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.

Name	Required	Description	Default
`kind`	No	Limit to one kind of result
`limit`	No
`query`	Yes	Words to look for, English or Russian
`language`	No	Language of titles and summaries	en

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections.

14 tool updatesOct 28, 2026
- First observedget_changelog
- First observedget_derivatives
- First observedget_etf_flows
- First observedget_events
- First observedget_fees
- First observedget_holder_distribution
- First observedget_holders
- First observedget_network_stats
- First observedget_price
- First observedget_rainbow_model
- First observedget_risk_score
- First observedget_stock_to_flow
- First observedget_volatility
- First observedsearch_site

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