How can I view 0x254c…39de's crypto portfolio?

You can view the full portfolio of 0x254c…39de (0x254ca6550883d5ab2c1ea7ce92a15a039b4239de) on Zerion at https://app.zerion.io/0x254ca6550883d5ab2c1ea7ce92a15a039b4239de/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.