io.github.mrfentmen/beaconchain-mcp
beaconchain-mcp
Ethereum beacon chain: state, rewards, epochs.
alive probed 2026-10-15
3tools
442tokens in Claude Opus 5.5
484tokens in Claude Code
0.2 %of a 200k context window
228o200k_base estimate
225 msto initialize
5 msto list tools
- Run it
- npx -y beaconchain-mcp@1.0.0 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- beaconchain-mcp 1.0.0
- Capabilities
- tools
- Instructions
- none
- Claude count
- Claude Opus 5.5, measured 2026-10-15. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/mrfentmen/awesome-mcps
- Registry
- active, updated 2026-09-24 · registry entry
- Reachable
- 1 of the last 1 probe
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| get_validator_rewards | 107 | 47 % |
| get_chain_state | 70 | 31 % |
| get_latest_epoch | 51 | 22 % |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.mrfentmen/beaconchain-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.