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Ethereum Attestation Service

Ethereum Attestation Service (EAS) is an open-source, permissionless protocol for creating and verifying structured attestations onchain or offchain. It provides infrastructure, smart contracts, SDKs, CLI tools, APIs, and an explorer for developers, agents, and builders creating trust, reputation, identity, provenance, and verification applications.
Distributed
1 current maintainer1 active lead1 new active lead

Maintainer signals as of Aug 10, 2026

Description

Ethereum Attestation Service is an open-source public-good protocol and base layer for making attestations—digital signatures over structured information—onchain or offchain. Its architecture centers on smart contracts for registering schemas and creating attestations, with support for resolvers, revocation, delegation, private data, zero-knowledge proofs, and composable referenced attestations. EAS is deployed across Ethereum, Layer 2 networks, and testnets, and is free to use, tokenless, and permissionless. EAS supports developers and non-technical builders through its SDK, contracts, CLI, indexing tools, GraphQL API, documentation, and EAS Explorer. Typical applications include identity and credential verification, reputation systems, supply-chain provenance, voting, content authenticity, ticketing, notary services, healthcare records, and private proofs. The project is built by and for the Ethereum community.

Grant Funding

VC Funding

ARB
DAI
ETH
OP
None

$3M

$0

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