This API allows you to extract most relevant terms from a text. It is not, like many others, a basic TF-IDF analysis. It compare the text against a very large language model, it uses a probabilistic model to identify candidates, it supports multi-words terms and not only single words. It uses part of speech tagging to clean up the results.
In short it is probably the most advanced term extraction out there.
We currently support only English, French and Italian languages. More languages coming soon!