How can I view 0xf4f28b08's crypto portfolio?

You can view the full portfolio of 0xf4f28b08 (0xf4f21033e492d52ea8c8ae886809078081258b08) on Zerion at https://app.zerion.io/0xf4f21033e492d52ea8c8ae886809078081258b08/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.