
Netlify is a hosting service for the programmable web.
Netlify API is a free Development API that requires OAuth authentication, is served over HTTPS and has unconfirmed CORS support.
Use our REST API to interact with our platform. Learn the basics for using the API, instructions for deploying sites, and notes on commonly used endpoints.
Details from docs.netlify.com.

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The Netlify API is provided by Netlify Docs (docs.netlify.com). Use our REST API to interact with our platform. Learn the basics for using the API, instructions for deploying sites, and notes on commonly used endpoints.
Yes. The Netlify API is listed in the Development 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 Netlify API uses OAuth authentication, so you need to register for credentials before making requests.
CORS support for the Netlify API is unknown. Test a request from the browser, and fall back to a server-side call if it is blocked.
Yes. The Netlify API is served over HTTPS, so it's safe to use in production.