NewEAS CLI: built for agents

Open source. Free to Use. Zero API Keys.

Attestation infrastructure for verifiable data.

Built for devs and agents to sign structured data so others can rely and build on it.

$ npm i @ethereum-attestation-service/eas-sdk
This attestation is an example, not a real on-chain record.

Attestation

0x9e2a…9b14
May 14, 2026 · 4:20pm UTC
Never
Yes
#42

AI Eval Result

evals.frontierlab.eth0x4F8E…aC72
oss-model.eth0xC1A0…9Ec1
model
claude-opus-4.7
benchmark
SWE-bench Verified
resolved
392 / 500
score_bps
7840(78.40%)
dataset_sha
0x4a9c…f93e
run_id
run_2026_05_14_b3f2c1
0xc0c9…d813
Attestations
9.5M+
Attesters
450k+
Coinbase
Ethereum Foundation
ETHGlobal
Base
Scroll
Optimism

Register a schema and attest with it.

Publish attestations to a blockchain, or keep them private in a local store or database, verifiable on demand.

registerSchema.ts
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Tools

Everything you need to build fast.

You, agents, and machines can attest, verify, and build on attested data in hours, not quarters.

Use cases

Attest to anything and everything.

Anytime you need someone or something else to trust the authenticity of your data, structure it and sign it.

Machines attesting to their outputs

AI evals, model runs, and agent actions, signed by the machine that produced them.

Authenticity of anything

Attest to a hash of any document, signature, or file. Provably from the source.

Reputation systems

Build trusted reputation systems with composable attestations.

Real World Asset verifications

Attest to the authenticity of RWAs like property, commodities, and collectibles.

Private proofs

Prove a fact without revealing the underlying data.

Data oracles

Bring real-world data into apps with a signature anyone can verify.

  • Ticketing

    Tickets that can’t be forged or double-spent.

  • Voting

    Eligibility and ballots, verifiable by anyone.

  • Proof of X

    Attendance, completion, or contribution.

  • Verifications

    KYC, licenses, and audits. Portable across apps.

Integrations

Deployed where builders build.

The same SDK works across Ethereum and every major network, anywhere your users are.

View deployments

Attestation Explorer

Browse attestations across networks.

Every deployed chain has its own explorer for verifying attestations and registering schemas.