Newton vs World Bank

Newton is a keyless calculator API deployed as a Vercel serverless function: the operation (simplify, factor, derive, integrate, and more) and expression are both encoded directly in the URL path, and it answers with a small JSON object containing the result. It's a solo open-source project (aunyks/newton-api) rather than a commercial service, so there's no pricing tier or rate limit to opt into.

The World Bank's Indicators API gives free, keyless REST access to the World Development Indicators dataset — thousands of economic, social, and environmental indicators across nearly 300 countries and regions, spanning six decades. Responses are paginated JSON or XML, covering countries, regions, income levels, lending types, topics, sources, and the indicator series themselves.