How can I view 0x9f837d57's crypto portfolio?

You can view the full portfolio of 0x9f837d57 (0x9f834835927a0d9d589620669c0cd16b6af87d57) on Zerion at https://app.zerion.io/0x9f834835927a0d9d589620669c0cd16b6af87d57/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.