StackRates
VPS and cloud server prices from 46 providers, read daily from their own pricing pages and APIs
Economic data for 218 countries — GDP, population, inflation, and 440+ indicators from IMF and World Bank.
Statistics of the World 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.
Free REST API for 337 country indicators from the IMF, World Bank and WHO: rankings, country histories, search and release dates. 1,000 requests/day free.
Details from statisticsoftheworld.com.

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.
VPS and cloud server prices from 46 providers, read daily from their own pricing pages and APIs
Quality of Life Data
US property records by address: parcel, owner, appraised value, tax, flood zone and nearby schools
The Statistics of the World API is provided by Statistics of the World (statisticsoftheworld.com). Free REST API for 337 country indicators from the IMF, World Bank and WHO: rankings, country histories, search and release dates. 1,000 requests/day free.
Yes. The Statistics of the World 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 Statistics of the World API requires no authentication, so you can start making requests without signing up.
Yes. The Statistics of the World API supports CORS, so front-end JavaScript can call it directly.
Yes. The Statistics of the World API is served over HTTPS, so it's safe to use in production.