io.github.mrfentmen/esplora-mcp
esplora-mcp
Keyless MCP server for Esplora Bitcoin data: blocks, fees, transactions, addresses.
alive probed 2026-10-14
5tools
601tokens in Claude Opus 5.5
661tokens in Claude Code
0.3 %of a 200k context window
322o200k_base estimate
305 msto initialize
6 msto list tools
- Run it
- npx -y esplora-mcp@1.0.0 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- esplora-mcp 1.0.0
- Capabilities
- tools
- Instructions
- none
- Claude count
- Claude Opus 5.5, measured 2026-10-14. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/mrfentmen/awesome-mcps
- Registry
- active, updated 2026-09-22 · registry entry
- Reachable
- 1 of the last 1 probe
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| get_block | 82 | 25 % |
| get_tx | 68 | 21 % |
| get_address | 66 | 20 % |
| tip_height | 55 | 17 % |
| fee_estimates | 51 | 16 % |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.mrfentmen/esplora-mcp)
An entry for every probe that changed the result, the tool count or the token cost: Atom feed. Add it to a feed reader or a Slack RSS app to hear when the server stops answering or its tool set grows.