Pantry
Free JSON storage for small projects
Plain Text Storage.
Pastebin API is a free Cloud Storage & File Sharing API that requires apiKey authentication, is served over HTTPS and has unconfirmed CORS support.
Pastebin.com is the number one paste tool since 2002. Pastebin is a website where you can store text online for a set period of time.
Details from pastebin.com.

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Free JSON storage for small projects
The Pastebin API is provided by Pastebin (pastebin.com). Pastebin.com is the number one paste tool since 2002. Pastebin is a website where you can store text online for a set period of time.
Yes. The Pastebin API is listed in the Cloud Storage & File Sharing 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 Pastebin API uses apiKey authentication, so you need to register for credentials before making requests.
CORS support for the Pastebin API is unknown. Test a request from the browser, and fall back to a server-side call if it is blocked.
Yes. The Pastebin API is served over HTTPS, so it's safe to use in production.