io.github.mrfentmen/btc-address-mcp
btc-address-mcp
Is the io.github.mrfentmen/btc-address-mcp MCP server down? No. It answered initialize and tools/list in the probe of 2026-10-29.
Validate Bitcoin addresses offline with real base58check and bech32/bech32m checksums
alive probed 2026-11-15 · unchanged since 2026-10-29
- Run it
- npx -y @mrfentmen/btc-address-mcp@1.0.1 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- btc-address-mcp 1.0.0
- Capabilities
- tools
- Instructions
- none
- Of a 1M window
- <0.1 % of a 1M context window
- Count
- 404 tokens in Claude Opus 5.5, exact, measured 2026-10-29. With the Claude Code prefix mcp__…__ on each tool name: 443. The o200k_base estimate is 234. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/mrfentmen/awesome-servers
- Registry
- active, updated 2026-10-28 · registry entry
Most expensive tools
The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.73×.
| Tool | ≈ Claude tokens | o200k estimate | Share of this server |
|---|---|---|---|
| validate_btc_address | 164 | 95 | 41 % |
| derivation_path_info | 154 | 89 | 38 % |
| list_address_types | 86 | 50 | 21 % |
Compare this server with others.
More servers
Other registry entries on npmjs.com, the ones next to this name; all of them.
- io.github.mrfentmen/brightscript-mcp · alive
- io.github.mrfentmen/brightsky-mcp · alive
- io.github.mrfentmen/browser-mcp · alive
- io.github.mrfentmen/brreg-mcp · alive
- io.github.mrfentmen/btcturk-mcp · alive
- io.github.mrfentmen/buck-mcp · alive
- io.github.mrfentmen/buck2-mcp · alive
- io.github.mrfentmen/build-cache-mcp · alive
Servers that mention address.
- AQL PropertyCheck — check one exact address (Gold Coast & Brisbane) ai.alphaquantlabs/propertycheck · alive
- bodenrichtwert.ai — Verlässliche Bodenrichtwerte für Mensch und KI ai.bodenrichtwert/mcp · needs auth
- Postfleet ai.postfleet/postfleet · needs auth
- Probity Wallet Reputation ai.probitylabs/wallet-reputation · alive
- Command Mail app.commandmail/mail · needs auth
- HoodEx app.hoodex/hoodex · needs auth
- ai.smithery/demomagic-duckchain-mcp · not found
- IP Address API app.ip/ipinfo · alive
Badge for the README
The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.
A mail when this server changes
Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.
For the publisher
- The server answers initialize and tools/list. Nothing to fix.