Ethereum Foundation and Open Anonymity Project launch zkAPI for private API payments

• —zkAPI separates the payment layer from the request layer: providers see requests but not the payer
• —Credits are deposited into an Ethereum vault contract in one transaction and held as a private note
• —Spends are proven with Groth16 on BN254, commitments hashed with Poseidon, notes stored in a 32-level Merkle tree
• —The client exposes standard OpenAI and Ollama APIs on localhost, so existing apps work unchanged