How can I view langreneth's crypto portfolio?

You can view the full portfolio of langreneth (0x0690adc3dea3dd819064c60f9eecc22e60991f2c) on Zerion at https://app.zerion.io/0x0690adc3dea3dd819064c60f9eecc22e60991f2c/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.