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Ground supports USDC deposits and withdrawals on the following chains:
  • Arbitrum
  • Base
  • Ethereum
  • Polygon
  • Solana
Portfolio wallets return deposit addresses automatically for supported chains. Production wallets include deposit addresses for arbitrum, base, ethereum, polygon, and solana. If a chain is unsupported for the action you’re attempting, the API returns a 400 error with details.

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Sandbox chain keys

In sandbox, chain keys include the network suffix to make the testnet explicit. For example, the sandbox API returns ethereum_sepolia (not ethereum) as the deposit address key. Currently sandbox supports:
  • ethereum_sepolia — Ethereum Sepolia testnet
Production uses canonical chain names (arbitrum, base, ethereum, polygon, solana).
NOTE: USDC deposits and withdrawals on some chains may require an additional 20-30 minutes to bridge via CCTP. More documentation to follow on this.