Nansen announced the introduction of a pay-per-call model, leveraging the x402 protocol and PayAI infrastructure to optimize on-chain data access. This model allows users to instantly query wallet data, fund flows, and "smart money" signals via USDC micropayments, without the need for subscriptions, approvals, or API keys. The system automates the "request-billing-payment-return" process based on the HTTP 402 mechanism, supporting AI agents to autonomously complete calls and payments. Nansen stated that the new model covers its entire API ecosystem, with basic data queries priced at approximately $0.01 per call and advanced signals at approximately $0.05, and supports settlement on the Base and Solana networks. (Crowdfundinsider)