Cruncher

{
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "name": "io.github.islobodan/cruncher-mcp",
  "description": "Scientific calculator MCP server with 43 tools: arithmetic, trig, stats, unit conversion.",
  "title": "Cruncher",
  "repository": {
    "url": "https://github.com/islobodan/cruncher-mcp",
    "source": "github"
  },
  "version": "1.2.29",
  "websiteUrl": "https://github.com/islobodan/cruncher-mcp#readme",
  "packages": [
    {
      "registryType": "npm",
      "registryBaseUrl": "https://registry.npmjs.org",
      "identifier": "@slbdn/cruncher-mcp",
      "version": "1.2.29",
      "transport": {
        "type": "stdio"
      },
      "environmentVariables": [
        {
          "description": "Tool exposure tier: 'minimal' (5 tools), 'standard' (34 tools, default), or 'full' (43 tools)",
          "name": "CRUNCHER_TOOL_SET"
        },
        {
          "description": "Worker thread timeout in milliseconds for heavy calculations (default: 3000, range: 100-60000)",
          "name": "CRUNCHER_TIMEOUT"
        }
      ]
    }
  ],
  "_meta": {
    "io.modelcontextprotocol.registry/publisher-provided": {
      "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"
      ],
      "tiers": {
        "full": 43,
        "minimal": 5,
        "standard": 34
      },
      "tool": "manual",
      "toolCount": 43
    }
  }
}