Is the Free National Savings Certificate (NSC) 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/nsc?

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 Savings Certificate (NSC) Calculator API (2026)

National Savings Certificate API for 5-year fixed return post office small savings scheme.

Interactive API Playground & Live Test

GET/api/v1/nsc

Zero Auth • Open CORS

Query Parameters

principalnumber • required

Deposit amount in ₹

ratenumber • optional

Annual Govt interest rate % (default: 7.7)

yearsnumber • optional

Fixed tenure in years (default: 5)

curl -X GET "https://fincalculator.in/api/v1/nsc?principal=100000&rate=7.7&years=5" \
  -H "Accept: application/json"

Live JSON Response (HTTP 200 OK)

Click "Execute Live API Request" below...

Request Parameters Schema

Parameter	Type	Required	Description / Notes
principal	number	Required	Deposit amount in ₹
rate	number	Optional	Annual Govt interest rate % (default: 7.7)
years	number	Optional	Fixed tenure in years (default: 5)

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