How can I view 0x4a1f15be's crypto portfolio?

You can view the full portfolio of 0x4a1f15be (0x4a1f792cfb1aea9fc2bf319c503ed2fd14fc15be) on Zerion at https://app.zerion.io/0x4a1f792cfb1aea9fc2bf319c503ed2fd14fc15be/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.