Scientific calculator MCP server with 43 tools: arithmetic, trig, stats, unit conversion.
Connect Runs on your machine
claude mcp add cruncher-mcp -e CRUNCHER_TOOL_SET=<CRUNCHER_TOOL_SET> -e CRUNCHER_TIMEOUT=<CRUNCHER_TIMEOUT> -- npx -y @slbdn/[email protected]
{
"mcpServers": {
"cruncher-mcp": {
"command": "npx",
"args": [
"-y",
"@slbdn/[email protected]"
],
"env": {
"CRUNCHER_TOOL_SET": "<CRUNCHER_TOOL_SET>",
"CRUNCHER_TIMEOUT": "<CRUNCHER_TIMEOUT>"
}
}
}
}
{
"mcpServers": {
"cruncher-mcp": {
"command": "npx",
"args": [
"-y",
"@slbdn/[email protected]"
],
"env": {
"CRUNCHER_TOOL_SET": "<CRUNCHER_TOOL_SET>",
"CRUNCHER_TIMEOUT": "<CRUNCHER_TIMEOUT>"
}
}
}
}
{
"servers": {
"cruncher-mcp": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@slbdn/[email protected]"
],
"env": {
"CRUNCHER_TOOL_SET": "<CRUNCHER_TOOL_SET>",
"CRUNCHER_TIMEOUT": "<CRUNCHER_TIMEOUT>"
}
}
}
}
Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server runs locally, so its tools are listed by your MCP client once it starts.
Environment variables
| Name | Description |
|---|---|
CRUNCHER_TOOL_SETOptional | Tool exposure tier: 'minimal' (5 tools), 'standard' (34 tools, default), or 'full' (43 tools) |
CRUNCHER_TIMEOUTOptional | Worker thread timeout in milliseconds for heavy calculations (default: 3000, range: 100-60000) |
Details
| Package | @slbdn/[email protected] (NPM, stdio) |
| First published | 8 May 2026 |
| Last updated | 8 May 2026 |
| Registry name | io.github.islobodan/cruncher-mcp |
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