Is the Free Weekly SIP 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/sip?

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

Investment APIWeb Calculator UI

Free Weekly SIP Calculator API (2026)

API for calculating weekly systematic investment plan (SIP) returns.

Interactive API Playground & Live Test

GET/api/v1/sip

Zero Auth • Open CORS

Query Parameters

investmentnumber • required

Weekly SIP amount in ₹

interestnumber • required

Annual return rate %

yearsnumber • required

Investment duration in years

frequencystring • optional

weekly

curl -X GET "https://fincalculator.in/api/v1/sip?investment=2000&interest=12&years=5&frequency=weekly" \
  -H "Accept: application/json"

Live JSON Response (HTTP 200 OK)

Click "Execute Live API Request" below...

Request Parameters Schema

Parameter	Type	Required	Description / Notes
investment	number	Required	Weekly SIP amount in ₹
interest	number	Required	Annual return rate %
years	number	Required	Investment duration in years
frequency	string	Optional	weekly

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