Brazil Central Bank Open Data vs City, New York Open Data

A CKAN-based open-data catalogue from Banco Central do Brasil covering 4,200+ datasets — exchange rates, interest rates, public debt, and other monetary time series. Dataset metadata is browsable via the standard CKAN Action API, and most series resolve to the Central Bank's SGS (Sistema Gerenciador de Séries Temporais) endpoints, which return JSON or CSV for a specified date range with no key required.

NYC Open Data runs on Socrata; a live keyless GET against the SODA endpoint for the 311 service-request dataset (`data.cityofnewyork.us/resource/erm2-nwe9.json`) returned full JSON with a wildcard `Access-Control-Allow-Origin` header, and the same resource is fetchable as CSV by swapping the file extension. Anonymous reads work without any credential; registering a free Socrata app token is optional and only raises the per-IP throttling limit.