The ClearScript engine behind one endpoint.
The same request returns the same respelling, every time. Cache it as hard as you like.
Outputs come from rule systems and human-reviewed exception lexicons, per language pair — not from a model guessing.
If a pair or a word isn't supported yet, the API says so. It never improvises.
The API is open to integration partners first. Request a key, tell us your use case and volume; we'll come back quickly.