@fruitsbytes/country-list-ts/src/data/topo-json/unk.topo.json

It contains country information including 2 and 3 character ISO codes, country and capital names, currency information, telephone calling codes, and provinces ( first-tier political subdivisions).

{"type":"Topology","objects":{"unk.geo":{"type":"GeometryCollection","geometries":[{"properties":{"cca2":""},"type":null}]}},"arcs":[]}