How can I view marchescoeth's crypto portfolio?

You can view the full portfolio of marchescoeth (0x2e3baa9ec2a73e6813cbcea552f8a8db39e70bde) on Zerion at https://app.zerion.io/0x2e3baa9ec2a73e6813cbcea552f8a8db39e70bde/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.