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Scientific calculator MCP server with 43 tools: arithmetic, trig, stats, unit conversion.
Cruncher is an MCP server entry in ChatHome Skills, sourced from Official MCP Registry and scored 67/100. As a Model Context Protocol server, it exposes tools that MCP-compatible LLM clients such as Claude, Cursor, and Copilot can call directly, extending an agent's reach beyond its built-in capabilities. ChatHome Skills discovered this entry through its daily ingest of official registries and GitHub discovery queries, and re-verifies repository facts, freshness signals, and install metadata on every run. The quality score weighs official-registry presence, a working install command, license clarity, GitHub star trajectory, and repository freshness — the full formula is on the Sources page. The install command above is ready to copy. Review the last-pushed date and repository status before adding Cruncher to a production agent workflow; the snapshot facts below are point-in-time values from the most recent ingest.
npx -y @slbdn/cruncher-mcp@1.2.29Review the upstream source before running this command.
{
"_meta": {
"io.modelcontextprotocol.registry/official": {
"status": "active",
"isLatest": true,
"updatedAt": "2026-05-08T09:33:02.932233Z",
"publishedAt": "2026-05-08T09:33:02.932233Z",
"statusChangedAt": "2026-05-08T09:33:02.932233Z"
}
},
"server": {
"name": "io.github.islobodan/cruncher-mcp",
"_meta": {
"io.modelcontextprotocol.registry/publisher-provided": {
"tool": "manual",
"tiers": {
"full": 43,
"minimal": 5,
"standard": 34
},
"category": "calculator",
"features": [
"43 tools across 8 categories",
"zero-dependency pure Node.js",
"worker thread isolation with timeout protection",
"strict JSON-Schema validation",
"MCP spec 2025-11-25 compliant",
"tool annotations for safety metadata",
"fuzzy tool name matching",
"LRU result caching"
],
"toolCount": 43
}
},
"title": "Cruncher",
"$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
"version": "1.2.29",
"packages": [
{
"version": "1.2.29",
"transport": {
"type": "stdio"
},
"identifier": "@slbdn/cruncher-mcp",
"registryType": "npm",
"registryBaseUrl": "https://registry.npmjs.org",
"environmentVariables": [
{
"name": "CRUNCHER_TOOL_SET",
"description": "Tool exposure tier: 'minimal' (5 tools), 'standard' (34 tools, default), or 'full' (43 tools)"
},
{
"name": "CRUNCHER_TIMEOUT",
"description": "Worker thread timeout in milliseconds for heavy calculations (default: 3000, range: 100-60000)"
}
]
}
],
"repository": {
"url": "https://github.com/islobodan/cruncher-mcp",
"source": "github"
},
"websiteUrl": "https://github.com/islobodan/cruncher-mcp#readme",
"description": "Scientific calculator MCP server with 43 tools: arithmetic, trig, stats, unit conversion."
}
}