How can I view 0xfe9fdb8b's crypto portfolio?

You can view the full portfolio of 0xfe9fdb8b (0xfe9f57bec9244b97489c3a8ed09c17f678a2db8b) on Zerion at https://app.zerion.io/0xfe9f57bec9244b97489c3a8ed09c17f678a2db8b/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.