How can I view casewalkereth's crypto portfolio?

You can view the full portfolio of casewalkereth (0xd2838eb1cfb03aafed1d2968909b9a376b978bd1) on Zerion at https://app.zerion.io/0xd2838eb1cfb03aafed1d2968909b9a376b978bd1/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.