SIWA (Sign In With Agent)
Agent-identity authentication protocol modeled on Sign-In-With-Ethereum, letting services verify an agent before granting access.
Last release Mar 5, 2026
Overview
SIWA adapts the Sign-In-With-Ethereum pattern to AI agents, giving services a way to challenge and verify an agent's onchain identity/signature before granting API or application access, instead of relying on shared API keys. Built by Builders Garden; 43 GitHub stars, last push April 2026.
Sato Score
41/100· MediumHow open, active & verifiable — not a safety or returns grade.
- Maintenance & liveness
- 20/35
- Code transparency
- 16/20
- Interface verifiability
- 0/10
- Docs & demo
- 0/10
- Listing transparency & provenance
- 5/15
- Independent verification
- 0/10
Details
- Chains
- Ethereum
- Agent types
- Authentication protocol
- Open source
- Yes
- Last checked
- 2026-07-19
Marketplace Signals
No marketplace signals recorded for this resource yet.
Verification status reflects evidence reviewed by Sato Hub. Self-reported claims are never presented as verified.
Where SIWA (Sign In With Agent) fits
Related concepts: What Are Onchain Agents?, Onchain Agents vs Offchain Agents
Listing History
Recorded changes to SIWA (Sign In With Agent)'s listing — status, verification, Sato Score, and recent releases. Full history is kept in the listing record.
- Jul 19, 2026Listed on Sato Hub
- Jul 19, 2026Sato Hub began tracking this listing
Related Resources
ERC-8004: Trustless Agents
ActiveEthereum standard providing on-chain identity, reputation, and validation registries for AI agents.
COTI
ActivePrivacy infrastructure that gives MCP-compatible agents private wallets, encrypted messaging, and confidential smart contracts using Garbled Circuits.
Turnkey
ActiveSecure key management infrastructure with policy controls, commonly used for agent wallets.
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