How can I view 0x28e703d9's crypto portfolio?

You can view the full portfolio of 0x28e703d9 (0x28e77be81c15e003162df2215d572dc107ab03d9) on Zerion at https://app.zerion.io/0x28e77be81c15e003162df2215d572dc107ab03d9/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.