How can I view rolandereth's crypto portfolio?

You can view the full portfolio of rolandereth (0x4a04b76f5ac446541a8d10b776b52947fa8bc6e8) on Zerion at https://app.zerion.io/0x4a04b76f5ac446541a8d10b776b52947fa8bc6e8/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.