Semilla1 Guard is an on-chain spending-limit vault for AI agents on NEAR: give an agent money to act without giving it the keys to everything. The owner funds a vault contract and sets a per-transaction cap, a rolling 24-hour cap, a receiver allow-list and a cooldown. The agent only gets a NEAR function-call access key scoped to one method, agent_spend, so even a fully compromised agent can lose at most the daily cap, cannot pay unknown receivers, and cannot move funds directly. Every agent decision (allow or deny) is logged on-chain and every call emits a NEP-297 event; calls from other accounts are refused without consuming the vault's storage. It is live on NEAR testnet with explorer-verifiable ALLOW and DENY transactions, 10/10 unit tests, 9/9 sandbox integration tests and a reproducible sandbox demo. Tracks: AI Security & Defense and Agent Economy.
Loops House