Compute a fixed-rate mortgage monthly payment using the standard amortisation formula M = P·r(1+r)^n / ((1+r)^n - 1). Assumes monthly compounding.
This page documents the MCP tool findutils:mortgage_calculate. See the REST reference →
Call it over MCP
Tool name findutils:mortgage_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": "mortgage_calculate",
"arguments": {
"principal": 200000,
"annual_rate": 0.05,
"years": 30
}
}
}'Input schema
| Argument | Type | Required | Description |
|---|---|---|---|
| principal | number | yes | Loan amount. |
| annual_rate | number | yes | Annual interest rate as a decimal (0.065 = 6.5%). |
| years | number | yes | Loan term in years. |
Example arguments (verified)
{
"principal": 200000,
"annual_rate": 0.05,
"years": 30
}Also a REST endpoint
The same tool answers plain HTTP at
POST /api/tools/mortgage-calculate/execute — no key, 60 requests/min.
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