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Circle and Proof Help Businesses Trust AI Agent Transactions

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Circle and Proof Help Businesses Trust AI Agent Transactions

Proof and Circle Internet Group said Monday (Oct. 19) that they will demonstrate at Money20/20 how open identity and payment protocols can work together to enable businesses to trust transactions made by agents.

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The companies’ demo will include an artificial intelligence agent presenting a Proof verified credential over Proof’s open identity protocol, x401, and paying in USDC stablecoin over the open protocol for internet-native payments, x402, from a Circle Agent Wallet, they said in a Monday press release.

The x401 protocol, which Proof published in June, uses the web’s HTTP 401 “Unauthorized” response so a site can tell an agent what proof of identity it needs, while x402 uses the HTTP 402 “Payment Required” response so a site can tell an agent what payment it needs, according to the release.

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Because one protocol answers who the agent asks for, and the other answers how it pays, this combination lets a business pay an identity provider for each check on the spot, the release said.

The Proof wallet presents the person’s verified credential along with a signed credential for the purchase, the merchant checks the credential’s signature against Proof’s published public keys, the agent pays the merchant in USDC over x402 from a Circle Agent Wallet and the order completes, per the release.


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