
Save JSON with one request and get a URL; private JSON for each signed-in user of your app.
jstash API is a free Development API that requires apiKey authentication, is served over HTTPS and does not support CORS, so it should be called from a server.
Save a JSON document with one request, update it with its edit token, and keep it with an API key.
Details from jstash.app.

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.
Simple key-value storage REST API for quick prototyping
Convert JSON to JSONP (on-the-fly) for easy cross-domain data requests using client-side JavaScript
The jstash API is provided by jstash (jstash.app). Save a JSON document with one request, update it with its edit token, and keep it with an API key.
Yes. The jstash 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 jstash API uses apiKey authentication, so you need to register for credentials before making requests.
Not directly. The jstash API does not allow CORS, so call it from a server, serverless function or proxy instead of front-end JavaScript.
Yes. The jstash API is served over HTTPS, so it's safe to use in production.