ToolForte
Deterministic utilities: IBAN/VAT validation, cron parsing, regex, diffs, Dutch holidays, test data

Api and service management platform.
Tyk API is a free Development API that requires apiKey authentication, is served over HTTPS and supports CORS, so it can be called from the browser.
Our FREE-to-use-forever Open Source API Gateway is secure, lightweight and highly performant, putting efficient API management in your hands
Details from tyk.io.

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.
Deterministic utilities: IBAN/VAT validation, cron parsing, regex, diffs, Dutch holidays, test data
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Current time, UTC offset and DST for any time zone or IP, a drop-in WorldTimeAPI replacement
The Tyk API is provided by Tyk API Management (tyk.io). Our FREE-to-use-forever Open Source API Gateway is secure, lightweight and highly performant, putting efficient API management in your hands
Yes. The Tyk 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 Tyk API uses apiKey authentication, so you need to register for credentials before making requests.
Yes. The Tyk API supports CORS, so front-end JavaScript can call it directly.
Yes. The Tyk API is served over HTTPS, so it's safe to use in production.