Percentage Calculate

Percentage math. Modes: percent_of (a% of b), what_percent (a is what % of b), percent_change (from a to b).

This page documents the MCP tool findutils:percentage_calculate. See the REST reference →

Call it over MCP

Tool name findutils:percentage_calculate · no API keys · 120 requests/min per IP

Claude Code

claude mcp add findutils --transport http https://mcp.findutils.com/

Claude Desktop — claude_desktop_config.json

{
  "mcpServers": {
    "findutils": {
      "url": "https://mcp.findutils.com/"
    }
  }
}

Raw JSON-RPC (any MCP client) — verified example

curl -X POST https://mcp.findutils.com/ \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "tools/call",
    "params": {
      "name": "percentage_calculate",
      "arguments": {
        "mode": "percent_of",
        "a": 20,
        "b": 50
      }
    }
  }'

Input schema

Argument	Type	Required	Description
mode	string (percent_of \| what_percent \| percent_change)	yes	Calculation mode.
a	number	yes	First value.
b	number	yes	Second value.

Example arguments (verified)

{
  "mode": "percent_of",
  "a": 20,
  "b": 50
}

Also a REST endpoint

The same tool answers plain HTTP at POST /api/tools/percentage-calculate/execute — no key, 60 requests/min.

Open the REST reference for Percentage Calculate →

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