Circle Unleashes AI Agent Discovery Layer for Seamless USDC Payments

Circle, the fintech company behind the USDC stablecoin, has launched a new agent service discovery layer. This innovation is designed to redefine how artificial intelligence (AI) interacts with the internet economy by enabling AI agents to discover usable services using USDC and x402.

The new protocol allows builders to access a curated discovery layer for agentic services through Circle's Agent Stack, providing programmatic access to the full Agent Marketplace catalog. This means that users can deploy a single personal AI assistant with a funded wallet to manage dozens of individual software subscriptions, handling complete workflows by paying for resources incrementally on a pay-per-request basis.

The service operates under supervision enabled by fragmenting cryptographic keys, limiting the agent's role to authorized signers for specific transaction rules. Users define hard constraints such as maximum per-transaction caps, periodic rolling budgets, and whitelists.