How can I view 0xb9e252f9's crypto portfolio?

You can view the full portfolio of 0xb9e252f9 (0xb9e2a6a6af9bd4be575b765e8578272147b152f9) on Zerion at https://app.zerion.io/0xb9e2a6a6af9bd4be575b765e8578272147b152f9/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.