Covid 19 statistics state and district wise about cases, vaccinations, recovery within India.
Covid-19 India API is a free Health API that requires no API key, is served over HTTPS and has unconfirmed CORS support.
Details from data.covid19india.org.

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.
Open-source API for exploring Covid19 cases based on JHU CSSE
Maps, datasets, applications and more in the context of COVID-19
Global and countrywise data of Covid 19 daily Summary, confirmed cases, recovered and deaths
The Covid-19 India API is provided by COVID19-India API (data.covid19india.org).
Yes. The Covid-19 India API is listed in the Health 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 Covid-19 India API requires no authentication, so you can start making requests without signing up.
CORS support for the Covid-19 India API is unknown. Test a request from the browser, and fall back to a server-side call if it is blocked.
Yes. The Covid-19 India API is served over HTTPS, so it's safe to use in production.