
JSON formatted details about Telegram Bots available in database.
BotsArchive API is a free Open Data API that requires no API key, is served over HTTPS and has unconfirmed CORS support.
The most powerful archive of Telegram bots.
Details from botsarchive.com.

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The BotsArchive API is provided by BotsArchive (botsarchive.com). The most powerful archive of Telegram bots.
Yes. The BotsArchive API is listed in the Open Data 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.
No. The BotsArchive API requires no authentication, so you can start making requests without signing up.
CORS support for the BotsArchive API is unknown. Test a request from the browser, and fall back to a server-side call if it is blocked.
Yes. The BotsArchive API is served over HTTPS, so it's safe to use in production.