Zerion API Introduces $0.01 USDC Payment Per Call

The Zerion API has implemented a payment structure of $0.01 USDC per call for on-chain data queries by AI agents. Agents can request wallet portfolios, transaction histories, and DeFi position data without an API key. The official Zerion documentation categorizes authentication methods into three types: API key, x402, and MPP. The x402 method processes USDC payments on both Base and Solana, while MPP uses the same asset as a payment method on Tempo. The official AgentCash merchant page lists zerion.io as a payment API per call, and AgentCash provides a discovery and payment layer that helps AI agents find and pay for paid APIs. The Zerion API is stated to support over 40 chains and more than 8,000 protocols. The x402 is a public standard that utilizes HTTP 402 'Payment Required', allowing software to call only the necessary data and pay for it each time. This Zerion case illustrates the intersection of developer tools and agent payment infrastructure. Industry reactions are focused on x402 and the general theory of agent payments, while the actual scale of use and the speed of developer adoption will need to be confirmed through additional public materials.

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