Mistral AI
High-performance LLM API by Mistral AI including Mistral and Mixtral models, with a free tier

LLM pricing, context windows and deprecation dates, schema-validated and updated daily.
Modelfax API is a free Machine Learning API that requires no API key, is served over HTTPS and supports CORS, so it can be called from the browser.
Machine-readable registry of AI model pricing, context windows, and deprecation dates across OpenAI, Anthropic, and Google. Free JSON API.
Details from bytebrujo.github.io.

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High-performance LLM API by Mistral AI including Mistral and Mixtral models, with a free tier
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Yes. The Modelfax API is listed in the Machine Learning 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 Modelfax API requires no authentication, so you can start making requests without signing up.
Yes. The Modelfax API supports CORS, so front-end JavaScript can call it directly.
Yes. The Modelfax API is served over HTTPS, so it's safe to use in production.