How can I view 0x3b12bce3's crypto portfolio?

You can view the full portfolio of 0x3b12bce3 (0x3b123549b0639608a8a9995e84b0b75a79eebce3) on Zerion at https://app.zerion.io/0x3b123549b0639608a8a9995e84b0b75a79eebce3/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.