ArcSentinel

The Problem The biggest fear in Agentic Commerce is the "rogue agent" scenario. We are giving AI autonomy, but what happens if it hallucinates? Imagine an AI accidentally spending 1,000 USDC on an API service that was supposed to cost only 1 USDC. Right now, there is no safety net—users are forced to rely on blind trust. The Solution: ArcSentinel ArcSentinel acts as a "Financial Firewall" for the Arc Network. It is a middleware layer that sits between your AI Agent and its funds. Before a Circle Wallet is allowed to sign a transaction, ArcSentinel steps in. It uses Google Gemini 3 Flash to review the transaction context and verify it against the user’s strict rules (for example, "Never spend more than $50 in a single transaction"). Architecture Flow Input: The user's AI Agent tries to make a purchase (like buying API credits). Verification: The transaction details are intercepted and sent to the ArcSentinel Verification Engine. Reasoning: We use Gemini 3 Flash to "read" the invoice and cross-reference it with the user's pre-set risk profile. Execution: If—and only if—the transaction passes the check, the Circle Programmable Wallet signs it. Settlement: The USDC is transferred on the Arc L1 Network with sub-second finality. Circle Product Feedback (REQUIRED) Products Used: Arc L1, USDC, Circle Programmable Wallets. Why we chose them: We picked Arc because agent-to-agent transactions need speed; latency kills the user experience. USDC was the obvious choice because commerce requires price stability. What worked well: The documentation for Circle Wallets is robust and easy to follow. Also, the Arc Testnet faucet was very reliable for testing our basic transfers. Improvements: a more "Agent-Native" SDK for Circle Wallets. Currently, we have to build off-chain guardrails. It would be amazing to set spending limits directly at the smart contract level. Please create a specific "Agent Wallet" type in the Console that comes with built-in daily spending limits.