Nansen launched a pay-per-call model for on-chain data access, with basic queries priced at about $0.01 and advanced signals at about $0.05. The model uses x402 and PayAI to let users query wallet data, fund flows, and smart money signals through USDC micropayments without subscriptions, approvals, or API keys. Nansen said the system already covers its full API ecosystem and supports settlement on Base and Solana.