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Tools.Town
Free Online Tools for Everyone

Loan Calculator API

Calculate EMI, total interest, and full month-by-month amortization for home, car, personal, education, or business loans.

Category: Calculators Endpoint: /v1/calculators/loan Method: POST Auth: API Key

Fast & Accurate

Get precise results instantly.

Easy Integration

Simple REST API with JSON response.

Developer Friendly

Clear docs and SDK examples.

Free to Start

1,000 free requests/month.

Endpoint

All requests should be made to the following endpoint:

POST https://api.tools.town/v1/calculators/loan

Authentication

This endpoint requires an API Key. Include your API key in the request header.

Authorization: Bearer YOUR_API_KEY
You can get your API key from your dashboard.

Request Parameters

Send a POST request with JSON body.

Parameter Type Required Description Example
principal number Loan principal amount. 500000
annualRate number Annual interest rate (%). 8.5
tenureMonths number Loan tenure in months. 240
loanType string Loan label: home, car, personal, education, business, other. home

Example Request

curl -X POST "https://api.tools.town/v1/calculators/loan" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "principal": 500000,
    "annualRate": 8.5,
    "tenureMonths": 240
  }'

Example Response 200 OK

application/json
{
  "success": true,
  "data": {
    "emi": "0",
    "totalPayment": "0",
    "totalInterest": "0",
    "principal": "0",
    "annualRate": "0",
    "tenureMonths": "0",
    "monthlyRate": "0",
    "loanType": "string",
    "schedule": "string"
  }
}

Error Codes

Code Meaning
400 Bad Request — missing or invalid parameter
401 Unauthorized — API key missing or invalid
429 Rate limit exceeded — free tier: 1,000 requests/month
500 Internal Server Error — try again or contact support