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Simple interest

An MCP tool from the Calculators server, hosted on mcp.hjlabs.in.

Simple (non-compounding) interest: interest amount and total from principal, annual rate and time in years.

Name on the gateway: math__simple_interest · read-only.

Parameters

NameTypeDescription
principal requirednumberAmount.
annual_rate requirednumberAnnual rate in percent.
years requirednumberTime in years.

How to call it

Through the Smart Gateway, any client can run it by name with call_tool, or let the gateway find it with search_tools:

call_tool arguments
{
  "name": "math__simple_interest",
  "arguments": {
    "principal": 0,
    "annual_rate": 0,
    "years": 0
  }
}

Or connect the Calculators server directly, which lists 28 tools including this one:

Run in your terminal
claude mcp add --transport http hj-math https://mcp.hjlabs.in/mcp/math \
  --header "Authorization: Bearer YOUR_API_KEY"

Try asking

Use the simple interest tool with principal set to ….

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