Loan Calculator API
Calculate EMI, total interest, and full month-by-month amortization for home, car, personal, education, or business loans.
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.
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
{
"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 |