Data.parliament.uk
Contains live datasets including information about petitions, bills, MP votes, attendance and more
This API provides read access to DIP entities (e.g. activities, persons, printed material).
Deutscher Bundestag DIP API is a free Government API that requires apiKey authentication, is served over HTTPS and has unconfirmed CORS support.
Details from dip.bundestag.de.

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Contains live datasets including information about petitions, bills, MP votes, attendance and more
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The Deutscher Bundestag DIP API is provided by Parlamentssuche des Deuschen Bundestages (dip.bundestag.de).
Yes. The Deutscher Bundestag DIP 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 Deutscher Bundestag DIP API uses apiKey authentication, so you need to register for credentials before making requests.
CORS support for the Deutscher Bundestag DIP API is unknown. Test a request from the browser, and fall back to a server-side call if it is blocked.
Yes. The Deutscher Bundestag DIP API is served over HTTPS, so it's safe to use in production.