The Ethereum Attestation Service (EAS) is an open, public infrastructure for making on-chain and off-chain attestations about any subject using registered, reusable schemas. Each attestation is a signed, timestamped claim that can be verified, revoked, and composed by other applications. EAS provides a neutral primitive for building reputation systems, identity credentials, and trust layers without a centralised issuer.
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- Attestations are signed claims linked to reusable schemas, enabling composability across applications. Because EAS is permissionless and issuer-neutral, it serves as a foundational trust primitive for reputation, credentialing, and proof-of-membership use cases.