How can I view 851231eth's crypto portfolio?

You can view the full portfolio of 851231eth (0x9a7d2bc79d18bd4d246f54feb6f80c438df62ae0) on Zerion at https://app.zerion.io/0x9a7d2bc79d18bd4d246f54feb6f80c438df62ae0/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.