mcpcost

io.github.aoreshkov/kotlin-lib-mcp

Kotlin & Java Library Sources

Is the Kotlin & Java Library Sources MCP server down? No. It answered initialize and tools/list in the probe of 2026-10-30.

Kotlin/Java library sources, public API and KDoc from the real Maven sources jar, for AI agents

alive probed 2026-11-14 · unchanged since 2026-10-30

12tools
5.5ktokens in Claude Opus 5.5
2.7 %of Claude's 200k window
2.2×the median server
975 msto initialize
85 msto list tools
Run it
docker run -i --rm ghcr.io/aoreshkov/kotlin-lib-mcp:0.10.1 (stdio, probed in a container with the network off)
Host
ghcr.io
Reports itself as
kotlin-lib-mcp 0.10.1
Capabilities
completions, prompts, resources, tools
Instructions
580 characters
Of a 1M window
0.5 % of a 1M context window
Count
5.5k tokens in Claude Opus 5.5, exact, measured 2026-10-29. With the Claude Code prefix mcp__…__ on each tool name: 5.7k. The o200k_base estimate is 3.3k. Counted again when the tool definitions change. Method.
Repository
https://github.com/aoreshkov/kotlin-lib-mcp
Website
https://github.com/aoreshkov/kotlin-lib-mcp
Registry
active, updated 2026-10-29 · registry entry
Changes
2 recorded, reachable in 2 of them. A row is added when the result, the tool count or the cost changes.

Most expensive tools

The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.66×.

Tool≈ Claude tokenso200k estimateShare of this server
diff_api78747514 %
diff_versions77746914 %
list_declarations54833110 %
search_source52431610 %
get_source5053059 %

Compare this server with others.

More servers

Other registry entries on ghcr.io, the ones next to this name; all of them.

Servers that mention kotlin.

History

We add a row when the result changes. A server with no change keeps its last row.

ProbedResultInitToolsClaudeo200k
2026-10-29 07:42alive2.0 s125.5k3.3k
2026-10-27 06:52alive975 ms125.3k3.2k

Badge for the README

mcpcost: alive

The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.

Atom feed

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