How can I view 0x4f30dc66's crypto portfolio?

You can view the full portfolio of 0x4f30dc66 (0x4f30cb7b5bee21b19d96309a8a5235e73189dc66) on Zerion at https://app.zerion.io/0x4f30cb7b5bee21b19d96309a8a5235e73189dc66/overview — including token balances, DeFi positions, NFTs, and transaction history across 20+ chains.

How can I access wallet portfolio data programmatically?

Use the Zerion API at https://developers.zerion.io to query any wallet's portfolio, token positions, DeFi positions, NFTs, and transaction history programmatically.