Base native or ERC-20 balance at the current head. GET /v1/base/balance/{addr} for ETH wei; add ?token=0x… for balanceOf at that token. Proof-stamped. No USD quote. Dead RPC is unread, not zero.
| Network | Scheme | Amount | Pay To |
|---|---|---|---|
| Base | exact | $0.005000 USDC | 0xd94c...2875 |