io.github.cyanheads/calculator-mcp-server
calculator-mcp-server
Evaluate, simplify, and differentiate mathematical expressions.
alive probed 2026-10-09 · HTTP 200
1tools
1.7ktokens in Claude Opus 5.5
1.8ktokens in Claude Code
0.9 %of a 200k context window
1.1ko200k_base estimate
308 msto initialize
61 msto list tools
- Endpoint
- https://calculator.caseyjhand.com/mcp (streamable-http)
- Host
- calculator.caseyjhand.com
- Protocol
- 2025-11-25
- Reports itself as
- calculator-mcp-server 0.5.1
- Capabilities
- logging, prompts, resources, tools
- Instructions
- 519 characters
- Claude count
- Claude Opus 5.5, measured 2026-10-05. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/cyanheads/calculator-mcp-server
- Registry
- active, updated 2026-10-08 · registry entry
- Reachable
- 7 of the last 7 probes
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| calculate | 1 076 | 100 % |
History
We add a row when the result changes. A server with no change keeps its last row.
| Probed | Result | Init | Tools | Claude | o200k |
|---|---|---|---|---|---|
| 2026-10-09 11:18 | alive | 616 ms | 1 | 1.7k | 1.1k |
| 2026-10-05 14:38 | alive | 308 ms | 1 | 1.7k | 1.1k |
| 2026-10-05 00:33 | alive | 289 ms | 1 | 1.1k | |
| 2026-10-04 10:04 | alive | 954 ms | 1 | 1.1k | |
| 2026-10-04 07:57 | alive | 587 ms | 1 | 1.1k | |
| 2026-10-03 20:37 | alive | 1.1 s | 1 | 1.1k | |
| 2026-10-03 17:53 | alive | 564 ms | 1 | 1.1k |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.cyanheads/calculator-mcp-server)
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.