
Ethereum Attestation Service
Ethereum Attestation Service (EAS) is open-source infrastructure for signing and verifying any structured data on-chain or off-chain.

What is Ethereum Attestation Service?
EAS is a tokenless public good that lets anyone register a schema and issue attestations about identity, reputation, RWAs, AI evaluations or any other claim. Developers integrate via SDK, CLI and GraphQL across Ethereum, Arbitrum, Optimism, Base and other EVM chains, with 9.5M+ attestations made to date.
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App store listings are independently reviewed and written by Alchemy using a combination of inbound submissions, editorial research, public project sources, and third-party directories, including ecosystem data from The Grid under the Open Database License, DefiLlama, DappRadar, Reown, and chain ecosystem pages.

