Blockchain analytics firm Nansen has launched a pay-per-use model for its on-chain data API, allowing users to make micropayments in USDC for instant access to wallet profiles, token flows, and smart money signals. This new model, built on the x402 protocol and PayAI infrastructure, eliminates the need for monthly subscriptions or long-term contracts, catering to AI agents and developers who require flexible data access. The API offers two pricing tiers, both settled in USDC on Base or Solana. The Basic tier costs $0.01 per call, providing essential data like token filtering and wallet balances, while the Advanced tier at $0.05 per call offers proprietary signals such as smart money net flows. This innovative approach allows AI agents to autonomously execute payments, streamlining the data retrieval process for developers and researchers.