Ethereum Foundation launches zkAPI for private AI model payments

The interesting part is the privacy layer sitting on top of payments rather than inside the model itself: the provider still serves the request, it simply cannot tie that request to a funded vault. That makes zkAPI less a new payment rail than a compliance and data-hygiene question for anyone running paid inference, since unlinkability cuts both ways — protecting users and complicating the audit trails providers increasingly need. Whether ZK-proof authorization becomes a default expectation for API billing, or stays a niche tool for privacy-sensitive workloads, is the open question.