Ethereum Attestation Service (EAS)
Web3 / web3
The Ethereum Attestation Service is an open-source, permissionless infrastructure protocol for issuing, storing, and verifying on-chain and off-chain attestations on Ethereum and other EVM-compatible blockchains. EAS allows any entity to create reusable attestation schemas that other users can sign and issue to establish claims about facts, achievements, or attributes (e.g., "this person completed this course" or "this wallet holds this credential"). Attestations can be public (on-chain) for immutability and transparency, or off-chain for privacy, and are stored in a decentralized registry. EAS serves as critical infrastructure for decentralized identity, reputation systems, and proof-of-personhood applications. Example: A software bootcamp uses EAS to issue attestations confirming that graduates completed the program; employers and DAOs query the EAS registry to verify candidate qualifications without relying on centralized verification services. Why it matters for Web3: EAS provides a neutral, composable foundation for identity and credentialing across Web3, eliminating silos and enabling ecosystem interoperability. As applications build on standardized attestation schemas, EAS becomes critical infrastructure for decentralized trust, governance, and risk assessment across protocols.
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