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Tools.Town
290+ free online tools

FD Calculator API

Calculate Fixed Deposit maturity value and interest earned — quarterly, monthly, half-yearly, or yearly compounding.

◎ Category: Calculators◎ Endpoint: /v1/calculators/fd 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:

POSThttps://api.tools.town/v1/calculators/fd

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.

ParameterTypeRequiredDescriptionExample
principalnumber✓Principal must be greater than zero.500000
annualRatenumber✓Rate cannot be negative.8.5
tenureYearsnumber✓Tenure must be greater than zero.60
compoundingenum✕The compounding parameter.quarterly
payoutModeenum✕The payoutMode parameter.cumulative

Example Request

curl -X POST "https://api.tools.town/v1/calculators/fd" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "principal": 500000,
    "annualRate": 8.5,
    "tenureYears": 60
  }'

Example Response 200 OK

application/json
{
  "success": true,
  "data": {
    "principal": "0",
    "annualRate": "0",
    "tenureYears": "0",
    "compounding": "string",
    "payoutMode": "string",
    "n": "0",
    "totalInterest": "0",
    "maturityAmount": "0"
  }
}

Error Codes

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