Public Twitter/X data: profiles, tweets, replies, search, followers, lists, communities, trends.
TwittrAPI is a free Social API that requires apiKey authentication, is served over HTTPS and supports CORS, so it can be called from the browser.
TwittrAPI is a REST API for public Twitter/X data. Send your key in a header, get X's JSON back, pay per call from a prepaid balance.
Details from twittrapi.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.
Read X/Twitter profiles, search, timelines; account monitors with signed webhooks
The TwittrAPI is provided by TwittrAPI (twittrapi.com). TwittrAPI is a REST API for public Twitter/X data. Send your key in a header, get X's JSON back, pay per call from a prepaid balance.
Yes. The TwittrAPI is listed in the Social 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 TwittrAPI uses apiKey authentication, so you need to register for credentials before making requests.
Yes. The TwittrAPI supports CORS, so front-end JavaScript can call it directly.
Yes. The TwittrAPI is served over HTTPS, so it's safe to use in production.