Government · head-to-head
Brazil Central Bank Open Data vs City, Nantes 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.
Nantes Métropole's open-data portal runs OpenDataSoft; the stored record's `API Key` requirement is stale — a live keyless GET against the v2.1 Explore API (`data.nantesmetropole.fr/api/explore/v2.1/catalog/datasets`) returned full JSON catalogue metadata with a wildcard `Access-Control-Allow-Origin` header, and dataset exports in GeoJSON and CSV worked the same way with no key. An API key is only required for OpenDataSoft's write/administration endpoints, not for reading the catalogue's 590+ datasets.
| Brazil Central Bank Open Data | City, Nantes Open Data | |
|---|---|---|
| Authentication | None | None |
| Pricing | free | free |
| Formats | JSON, CSV | JSON, CSV, GeoJSON |
| CORS | yes | yes |
| HTTPS | Yes | Yes |
City, Nantes Open Data supports 3 response formats, while Brazil Central Bank Open Data offers fewer — pick City, Nantes Open Data for more integration flexibility.