io.github.mrfentmen/exoplanets-mcp

exoplanets-mcp

Confirmed exoplanets and their properties from the NASA Exoplanet Archive. No key required.

alive probed 2026-10-14

2tools

226tokens in Claude Opus 5.5

254tokens in Claude Code

0.1 %of a 200k context window

119o200k_base estimate

311 msto initialize

7 msto list tools

Run it: npx -y exoplanets-mcp@1.0.1 (stdio, probed in a container with the network off)
Host: npmjs.com
Reports itself as: exoplanets-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/exoplanets-mcp
Registry: active, updated 2026-09-21 · registry entry
Reachable: 1 of the last 1 probe

Most expensive tools

Tool	Tokens (o200k)	Share of this server
by_name	64	54 %
recent	55	46 %

Badge and feed

[![mcpcost](https://mcpcost.ulehla.dev/badge/io.github.mrfentmen/exoplanets-mcp.svg)](https://mcpcost.ulehla.dev/s/io.github.mrfentmen/exoplanets-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.