Circle Agent Stack offers agent-focused financial infrastructure—wallets, a service marketplace, and a CLI—to let autonomous actors hold funds and transact in USDC; the post specifically recommends using it with the x402 agent. Separately, 0xProject released Autonomous Agent Payments and framed the move as replacing human-oriented API keys to support agent-native payments.
Circle Agent Stack (agents.circle.com) provides wallets, a marketplace, and a CLI so autonomous agents can hold funds, discover services, and transact in USDC—recommended for use with the x402 agent.
Use it with x402 and USDC on Circle Agent Stack
agents.circle.com
Link
Circle for Agents
Financial infrastructure for autonomous economic actors. Wallets, a marketplace, and a CLI for agents to hold funds, discover services, and transact in USDC.
agents.circle.com
0x (@0xProject)
APIs are built for humans, NOT agents.
So we just killed the key.
👉 Introducing Autonomous Agent Payments by 0x
Video
— https://nitter.net/0xProject/status/2069843961909575917#m