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Ethereum Attestation Service
Ethereum Attestation Service (EAS) is an open-source, free-to-use attestation infrastructure that lets developers and autonomous agents sign structured data on-chain or off-chain so it can be verified and relied upon by others. It provides an SDK, CLI, indexer, and GraphQL API for creating and managing schemas and attestations.
Distributed
Description
Ethereum Attestation Service (EAS) is an open source, free to use protocol providing attestation infrastructure for verifiable data. It is built for both developers and AI agents to sign structured data—such as AI evaluation results, documents, or actions—so that the authenticity and provenance of that data can be verified by others. EAS offers tooling including an SDK (@ethereum-attestation-service/eas-sdk), a CLI, an indexer, and a GraphQL API, supporting both onchain and offchain attestations. Use cases highlighted include machine-to-machine attestations (AI evals, model runs, agent actions), document/file authenticity, reputation systems, real-world asset verification, private/ZK proofs, data oracles, ticketing, voting, proof of attendance/contribution, and portable verifications like KYC or licenses. The platform reports over 9.5M attestations and 450k+ attesters, serving developers, protocols, and agent builders across the crypto ecosystem.Grant Funding
VC Funding
ARB
DAI
ETH
OP
$3M
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