Brazilian Chamber of Deputies Open Data
Provides legislative information in Apis XML and JSON, as well as files in various formats

US labor statistics: inflation, unemployment, wages and productivity.
Bureau of Labor Statistics API is a free Government API that requires no API key, is served over HTTPS and has unconfirmed CORS support.
Details from bls.gov.

Unified API suite · now live
Geocode an address, validate an email, track a flight or pull stock data with one account, one dashboard and one API key.
Provides legislative information in Apis XML and JSON, as well as files in various formats
Consult companies by CNPJ for Brazilian companies
The Bureau of Labor Statistics API is provided by Bureau of Labor Statistics (bls.gov).
Yes. The Bureau of Labor Statistics API is listed in the Government category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
No. The Bureau of Labor Statistics API requires no authentication, so you can start making requests without signing up.
CORS support for the Bureau of Labor Statistics API is unknown. Test a request from the browser, and fall back to a server-side call if it is blocked.
Yes. The Bureau of Labor Statistics API is served over HTTPS, so it's safe to use in production.