How can I view sandboxlistingseth's crypto portfolio?

You can view the full portfolio of sandboxlistingseth (0xa6cc20c7665993db9863cd27aff1b1771b50af07) on Zerion at https://app.zerion.io/0xa6cc20c7665993db9863cd27aff1b1771b50af07/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.