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21 BTC

Dashboard aggregating bitcoin price, spot ETF flows, treasury holdings and on-chain network data, each figure with its source.

Actively maintained

AnalyticsAnalyticsMonitoringFree tier
21btc.cc ↗
Open 21btc.ccAlternativesSet it up for my team
21 BTC: data, price, alternatives
At a glancechecked Oct 28, 2026

not read yet

Use

For
Bitcoin investors and researchers tracking prices, ETF flows, treasuries and on-chain network data
Activity
Actively maintainedrelease 8 days ago · site updated 5 days ago
Company
Domain since 2026 (registered this year) · ~1 peopledomain registered · per their About page
Used for
  • check daily spot bitcoin ETF flows by fund
  • track which companies and governments hold bitcoin
  • screen a bitcoin address against the OFAC sanctions list
Worth knowingcomputed from what we read · each with its source
  • Has an MCP server (1 in the registry)public registry →
  • Publishes llms.txt, a file written for AI assistants21btc.cc ↗
The companyeach fact with its source · read Oct 29, 2026
How a program reaches itfound, not claimed · read Oct 29, 2026
  • MCP servercc.21btc/bitcoin-dataverified in the MCP registry
  • Stateanswers, 14 toolschecked 2026-10-29
  • Address to connect21btc.cc/mcp
  • MCP docs21btc.cc/mcpthe vendor's page ↗

MCP server details →

This card as JSON, for your agent →

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.

Alternatives in Analyticsby use, among tools still maintained

Figure and bar: visits/mo, estimate · year: online since

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From people who use itnot part of the reading

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Questions this page answers
  • What is 21 BTC?

    Dashboard aggregating bitcoin price, spot ETF flows, treasury holdings and on-chain network data, each figure with its source. It is listed in the Atlas under Analytics.

  • Who is 21 BTC for?

    Bitcoin investors and researchers tracking prices, ETF flows, treasuries and on-chain network data

  • Is 21 BTC still maintained?

    Actively maintained: release 8 days ago · site updated 5 days ago.

  • What are alternatives to 21 BTC?

    In Analytics, by use: AssetMont, Oxon Capital, Claryx, Lotlytics, CryptoKeyhole Studio.

How we read a tool

No votes, no reviews, no vendor claims. Every week a crawler reads each tool's own site and a few public registries, and the words on the card are bands over what it read.

  • Use: visits to the site (estimated), installs from npm and PyPI, presence in Chrome's usage report.
  • Activity: the newest release on GitHub, npm or PyPI; the newest dated page on the site; open roles on a public jobs board.
  • Price: the vendor's own pricing page, read with the date. A figure is printed only when it is on that page.
  • The line and the use cases are written by us from the homepage, one tool at a time, and refused when they repeat the vendor's marketing.

How AI assistants read each site — the reading vendors ask us about — is on each tool's own visibility page.

How we read every tool → · By INITE Atlas Desk