Ethereum Attestation Service

EAS lets anyone register a schema, such as an AI evaluation result or a proof of membership, and sign attestations against it that others can verify.

Attestations can be published on-chain or kept privately and checked on demand, with no API keys or fees beyond gas.

More than 9.5 million attestations have been made by 450,000 attesters, and the contracts are deployed on many networks, including Unichain.