How can I view etheth's crypto portfolio?

You can view the full portfolio of etheth (0xc7b42f99c63126b22858f4eed636f805cfe82c91) on Zerion at https://app.zerion.io/0xc7b42f99c63126b22858f4eed636f805cfe82c91/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.