
An Indian Government platform that provides a lot of APIS for KYC, business, education & employment.
API Setu API is a free Open Data API that requires no API key, is served over HTTPS and supports CORS, so it can be called from the browser.
API Setu is an Open API (Application Programming Interface) Platform from Ministry of Electronics and IT, Government of India. An API platform to enable swift, transparent, safe and reliable information sharing across applications and to promote innovation.
Details from apisetu.gov.in.

Unified API suite · now live
Geocode an address, validate an email, track a flight or pull stock data with one account, one dashboard and one API key.
Zillow property data: 50+ fields per listing by address, URL, ZPID or ZIP, with sold data and comps
Normalized historical records and 25 daily-updated reference series
The API Setu API is provided by API Setu: Get access to thousands of APIs (apisetu.gov.in). API Setu is an Open API (Application Programming Interface) Platform from Ministry of Electronics and IT, Government of India. An API platform to enable swift, transparent, safe and reliable information sharing across applications and to promote innovation.
Yes. The API Setu API is listed in the Open Data category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
No. The API Setu API requires no authentication, so you can start making requests without signing up.
Yes. The API Setu API supports CORS, so front-end JavaScript can call it directly.
Yes. The API Setu API is served over HTTPS, so it's safe to use in production.