How can I view landmarseth's crypto portfolio?

You can view the full portfolio of landmarseth (0x40a82a3ac2bb08e82133e25cbc6ca128dc7162aa) on Zerion at https://app.zerion.io/0x40a82a3ac2bb08e82133e25cbc6ca128dc7162aa/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.