How can I view 83841eth's crypto portfolio?

You can view the full portfolio of 83841eth (0x42d4c4c04495699ff4fa2e19299201ad9cf36377) on Zerion at https://app.zerion.io/0x42d4c4c04495699ff4fa2e19299201ad9cf36377/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.