mcpcost

io.github.LufeMC/kaval

Kaval

Is the Kaval MCP server down? No. It answered initialize and tools/list in the probe of 2026-10-31.

Verify the facts an agent's action depends on before it acts — ALLOW, REVIEW, or BLOCK.

alive probed 2026-11-14 · unchanged since 2026-10-31

7tools
4.7ktokens in Claude Opus 5.5
2.4 %of Claude's 200k window
1.9×the median server
235 msto initialize
11 msto list tools
Run it
npx -y @usekaval/mcp@0.7.1 (stdio, probed in a container with the network off)
Host
npmjs.com
Reports itself as
kaval 0.7.1
Capabilities
tools
Instructions
none
Of a 1M window
0.5 % of a 1M context window
Count
4.7k tokens in Claude Opus 5.5, exact, measured 2026-10-17. With the Claude Code prefix mcp__…__ on each tool name: 4.8k. The o200k_base estimate is 2.8k. Counted again when the tool definitions change. Method.
Repository
https://github.com/LufeMC/kaval-clients
Website
https://usekaval.com
Registry
active, updated 2026-08-05 · registry entry

Most expensive tools

The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.67×.

Tool≈ Claude tokenso200k estimateShare of this server
check1 63897935 %
verify99259321 %
add_source82849518 %
get_receipt3712228 %
report_outcome3482087 %

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Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.

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