Is the Free National Pension System (NPS) Calculator API free to use in production apps?

Yes! All FinCalculator REST APIs are completely free, zero-auth, open-CORS, and edge-cached for high performance across global web and mobile applications.

What is the rate limit for /api/v1/compounding?

Endpoints are cached at the edge for 24 hours. There are no restrictive rate limits for standard web traffic and mobile applications.

Government Schemes APIWeb Calculator UI

Free National Pension System (NPS) Calculator API (2026)

API for National Pension System (NPS Tier 1) retirement accumulation and annuity pension payouts.

Interactive API Playground & Live Test

GET/api/v1/compounding

Zero Auth • Open CORS

Query Parameters

contributionnumber • required

Monthly deposit in ₹

ratenumber • optional

Expected return % (default: 10)

yearsnumber • required

Investment duration in years

curl -X GET "https://fincalculator.in/api/v1/compounding?contribution=10000&rate=10&years=25" \
  -H "Accept: application/json"

Live JSON Response (HTTP 200 OK)

Click "Execute Live API Request" below...

Request Parameters Schema

Parameter	Type	Required	Description / Notes
contribution	number	Required	Monthly deposit in ₹
rate	number	Optional	Expected return % (default: 10)
years	number	Required	Investment duration in years

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