Circle Agent Stack is a chain-and protocol-agnostic infrastructure purpose-built for the agentic economy, empowering agents to hold assets, transact, and access services across ecosystems.
The Circle Agent Stack is composed of Agent Wallets, Agent Nanopayments, Agent Marketplace, CLI, and Skills. Together these products act as one workflow.
Agent Wallets is a wallet type designed for AI agents to hold, trade, and bridge USDC across chains and pay for services autonomously within human-defined spending policies. It is built for headless, machine-initiated use instead of manual approval for every transaction.
The list of supported chains continues to evolve. Supported chains include Arbitrum, Arc testnet, Avalanche, Base, Ethereum, Monad, OP Mainnet, Polygon PoS, and Unichain.
You can create an Agent Wallet through Circle CLI without using an API key. There is no sign-up required. Agents authenticate through email OTP.
Custom spending policies are available for Mainnet only. Any policy updates require an email OTP to confirm the changes.
CLI is a command-line tool that helps users tell agents what to do, like create wallets, move funds, and complete transactions
CLI supports funding, transfers, contract execution, signing messages or transactions, bridging USDC through CCTP, trading through LiFi, and paying through Nanopayments powered by Circle Gateway.
Circle CLI is designed to work across supported chains and protocols, allowing agents to execute actions consistently across ecosystems.
Agent Marketplace provides a curated service category for agents to discover, evaluate, and pay for services. Agents can compare pricing and capabilities and settle with USDC to access hundreds of endpoints.
Agents pay using USDC through Nanopayments or supported protocols like x402. Payment is embedded in the request, so access and payment happen in a single step without separate billing or authentication flows.
Agents can pay and use services without accounts or API keys.
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