How can I view 0xc70c303f's crypto portfolio?

You can view the full portfolio of 0xc70c303f (0xc70c5eb1e986d8907a555c37b7a7b9b6fc5c303f) on Zerion at https://app.zerion.io/0xc70c5eb1e986d8907a555c37b7a7b9b6fc5c303f/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.