Loan Calculate

Finance REST API MCP

Amortise a fixed-rate loan and show the impact of an optional monthly extra payment on payoff time and total interest.

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

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Call it over MCP

Tool name findutils:loan_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": "loan_calculate",
      "arguments": {
        "principal": 10000,
        "annual_rate": 0.05,
        "years": 5
      }
    }
  }'

Input schema

Argument Type Required Description
principal number yes Loan balance.
annual_rate number yes Annual interest rate as a decimal.
years number yes Contract length in years.
extra_payment number no Optional monthly extra paid on top of the standard payment.

Example arguments (verified)

{
  "principal": 10000,
  "annual_rate": 0.05,
  "years": 5
}

Also a REST endpoint

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

Open the REST reference for Loan Calculate →

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