The system, built by the Open Anonymity Project with the Ethereum Foundation and live on Ethereum Mainnet, lets users deposit ETH or USDC into a vault contract once, then spend via zero-knowledge proofs that reveal no identity. Deposits are Merkle-tree commitments; nullifiers prevent double-spending. A server mints short-lived, dollar-capped API keys after verifying proofs, while providers see prompts but not who paid. It uses Groth16 on BN254 and Poseidon hashing. Limitations include no network anonymity and prompt-content re-linking; Tor and TEE models are suggested mitigations. The design stems from a post by Davide Crapis and Vitalik Buterin.

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  2. First reportEthereum Foundation and Open Anonymity launch zkAPI on Ethereum mainnet5 acc.

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  • @g13m Captain GMFirst reportOn X ↗

    Ethereum Foundation and Open Anonymity put zkAPI on mainnet. You deposit once into an Ethereum vault. After that, each AI session is paid with a zero-knowledge proof, so no account is tied to the prompt. The model sees what you asked. The payment server sees what you spent.…

  • @FlyingNobita Flying NobitaOn X ↗

    Cloud AI inference always meant linking your wallet to your prompts. zkAPI breaks that link. This is less about hiding the inference itself and more about not having to attach an identity to the payment. The provider still sees the request. The payment layer just can't tie it… https://t.co/yDuxbv8Ogk

  • @Ucan_Coin 𝖀𝖈𝖆𝖓On X ↗

    The Ethereum Foundation and Open Anonymity Project have launched zkAPI on Ethereum mainnet, allowing users to deposit ETH once and authorize metered API usage through zero knowledge proofs without revealing their billing identity. The interesting part is how the payment and the… https://t.co/uWlEowgaQV

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  • @Defi_Edward EdwardOn X ↗

    zkAPI went live on ethereum mainnet yesterday. Co-designed by @VitalikButerin and the foundation's dAI lead back in february. Worth being precise about what it actually hides though. A user deposits $ERH or $USDC into a vault, then uses a zero-knowledge proof to get a… https://t.co/pqBwKoxgAl

  • @AxelBeastt Axel BeastOn X ↗

    Every AI API key quietly creates a history of you. Account → payment method → every request. Ethereum's new zkAPI tries something different: deposit credits once, then prove you're allowed to spend them without revealing which deposit or who you are. The API sees the…

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