New South Wales Government Open Data.
Open Government, New South Wales API is a free Government API that requires apiKey authentication, is served over HTTPS and has unconfirmed CORS support.
Details from api.nsw.gov.au.

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Mexican Statistical Government Open Data
The Open Government, New South Wales API is provided by api.nsw (api.nsw.gov.au).
Yes. The Open Government, New South Wales 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.
Yes. The Open Government, New South Wales API uses apiKey authentication, so you need to register for credentials before making requests.
CORS support for the Open Government, New South Wales API is unknown. Test a request from the browser, and fall back to a server-side call if it is blocked.
Yes. The Open Government, New South Wales API is served over HTTPS, so it's safe to use in production.