io.github.flacales/exact-calc-mcp

exact-calc

Is the exact-calc MCP server down? No. It answered initialize and tools/list in the probe of 2026-10-30.

Exact arithmetic for AI agents. Two independent engines cross-check every result.

alive probed 2026-11-15 · unchanged since 2026-10-30

5tools

1.8ktokens in Claude Opus 5.5

0.9 %of Claude's 200k window

0.7×the median server

2.1 sto initialize

5 msto list tools

Run it: uvx exact-calc-mcp@0.1.0 (stdio, probed in a container with the network off)
Host: pypi.org
Reports itself as: exact-calc 0.1.0
Capabilities: experimental, prompts, resources, tools
Instructions: 380 characters
Of a 1M window: 0.2 % of a 1M context window
Count: 1.8k tokens in Claude Opus 5.5, exact, measured 2026-10-16. With the Claude Code prefix mcp__…__ on each tool name: 1.9k. The o200k_base estimate is 1.1k. Counted again when the tool definitions change. Method.
Repository: https://github.com/flacales/exact-calc-mcp
Registry: active, updated 2026-10-02 · registry entry

Most expensive tools

The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.60×.

Tool	≈ Claude tokens	o200k estimate	Share of this server
calculate	688	430	38 %
are_equal	370	231	21 %
to_fraction	280	175	16 %
verify	272	170	15 %
engine_status	179	112	10 %

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

Kongen Labs — Pattern Intelligence io.github.fisnik/kongen-mcp · crashed on start
Valun io.github.fitzss/valun · alive
io.github.fitzyracing1/superuser · needs env
io.github.fkom13/gencodedoc · crashed on start
Agent Card Starter io.github.flowboxx/agent-card-starter · needs args
io.github.flowiesner/fronius-mcp · needs mcp<2
Abe io.github.flowinfosystems-index/abe · needs args
SpotGPU io.github.flowtestpro-svg/spotgpu-mcp · alive

Servers that mention exact.

AQL PropertyCheck — check one exact address (Gold Coast & Brisbane) ai.alphaquantlabs/propertycheck · alive
Hermitsh Texts ai.hermitsh/texts · needs auth
Manpage MCP ai.manpage/mcp · alive
SPM ai.spmos/spm · needs auth
Python Code Validator ai.statemind/python-code-validator · alive
Spala Public MCP ai.spala/public-mcp · alive
ai.smithery/arjunkmrm-fetch · not found
Calligraphy Maker by Studio99 app.studio99/calligraphy · needs auth

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

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