How can I view 0x54881b1f's crypto portfolio?

You can view the full portfolio of 0x54881b1f (0x54881e63f225a8653c2da91fc3d9769e35b81b1f) on Zerion at https://app.zerion.io/0x54881e63f225a8653c2da91fc3d9769e35b81b1f/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.