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Tools.Town
Free Online Tools for Everyone

Loan EMI Calculator API

Calculate monthly loan EMI, total interest payable, and full amortisation schedule for any loan.

Category: Finance Endpoint: /v1/finance/emi-calculator Method: GET 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:

GET https://api.tools.town/v1/finance/emi-calculator

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 GET request with query parameters.

Parameter Type Required Description Example
principal number Principal must be greater than zero. 500000
annualRate number Rate cannot be negative. 8.5
tenureMonths number Tenure must be at least 1 month. 60

Example Request

curl -G "https://api.tools.town/v1/finance/emi-calculator" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  --data-urlencode "principal=500000" \
  --data-urlencode "annualRate=8.5" \
  --data-urlencode "tenureMonths=60"

Example Response 200 OK

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

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