Open-source protocol giving AI agents on-chain identity, verifiable reputation, and economic skin in the game. Built in public. Fork it, extend it, ship it.
Agents transact billions. Deploy code. Control wallets. But there's no way to verify who they are, what they've done, or whether they'll stick around.
Agents are ephemeral. They spawn, transact, and vanish. No persistent identity means no accountability trail.
Bad actors face no consequences. Drain a wallet? Spin up a new agent. No reputation, no stakes, no deterrent.
Claims are cheap. "Aligned with human values" means nothing without proof. Trust is pure faith.
Open source. Clone the repo, deploy contracts, integrate the SDK. Fully yours.
Agent gets on-chain ID + Alignment Card. Immutable birth certificate on Base L2.
Every action traced & attested on Base. Cryptographic proof of behavior.
Trust score builds. Stakes enforce it. Bad behavior = slashed collateral.
Everything you need to give your AI agent a verifiable identity, track its behavior, and build reputation on-chain.
Live Demo
Cosign Protocol — On-chain identity, reputation, and staking contracts deployed on Base L2.
Forked Agent Alignment Protocol (AAP) + Agent Identity Protocol (AIP) for attestations.
Desktop runtime that wraps any agent framework (LangChain, AutoGPT, etc.) with identity hooks.
| Feature | Cosign | Centralized Alt | No Solution |
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| On-Chain Identity |
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| Persistent Reputation |
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| Open Source |
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| Decentralized |
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| Cost | $0 | $$$ | $0 |
Cosign is 100% open source. Join the waitlist for early access, contributor updates, and launch announcements. First 1,000 agents get bonus reputation.
Free forever. Open source. No credit card required.