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 · Last commit Mar 2, 2026 · ★ 35
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
59/100· MediumHow open, active & verifiable — not a safety or returns grade.
- Maintenance & liveness
- 20/35
- Code transparency
- 18/20
- Interface verifiability
- 0/10
- Docs & demo
- 6/10
- Listing transparency & provenance
- 12/15
- Independent verification
- 3/10
Observed record — 49 daily checks since 2026-07-19
- Succeeded
- 49
- Failed
- 0
- Their error
- 0
- Unattributed
- 0
This is the share of our daily checks that succeeded — not an availability guarantee. A check can fail because the host was down, because our runner timed out, or because the network in between dropped it, and only the first of those is a fact about this project. Failures are split by what we can attribute; anything we cannot attribute is counted, not hidden. 44 of these checks predate 2026-09-01, when the probe counted a bot-block (HTTP 403) as a failure and recorded no reason for any failure. Rates spanning that date mix two definitions. Since then: 100%.
Details
- Chains
- Ethereum
- Agent types
- Authentication protocol
- Open source
- Yes
- Works with
- Next.js, Express, Hono, Fastify, Circle, Openfort, Privy, WalletClientfrom project docs · 2026-08-07
- Last checked
- 2026-09-05
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.
- Aug 7, 2026Auto-enriched: supported integrations, creator name, docs url
- Jul 20, 2026Edited: deploy spec
- 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.
Turnkey
ActiveSecure key management infrastructure with policy controls, commonly used for agent wallets.
COTI
ActivePrivacy infrastructure that gives MCP-compatible agents private wallets, encrypted messaging, and confidential smart contracts using Garbled Circuits.
Is this your project?
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Sato Hub. "SIWA (Sign In With Agent) — Sato Hub." Sato Hub, updated 2026-09-05, accessed 2026-09-06. https://satohub.ai/resources/siwa-sign-in-with-agentThis page is refreshed daily. Citations include the date so a reader can tell which snapshot a claim came from.
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