How can I view maximus2003eth's crypto portfolio?

You can view the full portfolio of maximus2003eth (0x203cf248c050040bf4a92ff4534021ba1f3c9e90) on Zerion at https://app.zerion.io/0x203cf248c050040bf4a92ff4534021ba1f3c9e90/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.