
Easy google sheets integration.
Sheetsu API is a free Development API that requires apiKey authentication, is served over HTTPS and has unconfirmed CORS support.
Turn any Google Sheet into a JSON REST API in seconds. Read, search, add, update and delete rows over HTTP. No OAuth, no Google Cloud setup. Free plan.
Details from sheetsu.com.

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Geocode an address, validate an email, track a flight or pull stock data with one account, one dashboard and one API key.
Extract metadata, tech stack, emails, and screenshots from any URL
The Sheetsu API is provided by SheetDB (sheetsu.com). Turn any Google Sheet into a JSON REST API in seconds. Read, search, add, update and delete rows over HTTP. No OAuth, no Google Cloud setup. Free plan.
Yes. The Sheetsu 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 Sheetsu API uses apiKey authentication, so you need to register for credentials before making requests.
CORS support for the Sheetsu API is unknown. Test a request from the browser, and fall back to a server-side call if it is blocked.
Yes. The Sheetsu API is served over HTTPS, so it's safe to use in production.