The zkAPI system implements a design for zero-knowledge API usage credits published on February 11, 2026, by Ethereum co-founder Vitalik Buterin and Ethereum Foundation dAI team lead Davide Crapis

From the articleEthereum zkAPI Launches Privacy-Preserving API Payments on MainnetAlso in Ethereum Foundation launches zkAPI to let users pay for AI models without revealing identity, Ethereum Foundation Launches Privacy Tool That Cuts the Link Between AI Prompts and Payers - Unchained