World Bank API
World Bank (worldbank.org) has 2 public methods: get country statistic and compare countries by a statistic. Each costs 1 credit per completed run (1¢ with pay as you go); failed runs are free.
Unofficial. Not affiliated with or endorsed by World Bank.
Methods
2Looks up a World Bank statistic for a country and returns its annual values and latest value for the selected years.
Returns country, statistic, unit, latest value and year, annual values, source, data page link
Readdata.worldbank.org/get_country_statisticRanks countries by a World Development Indicators statistic for a given year, or for the latest year with broad country coverage. Regional aggregates and countries without data for that year are left out.
Returns statistic name, unit, year, indicator code, ranked countries with values and chart links
Readworldbank.org/compare_countries