GET /api/balance

Balances are segmented per (currency, network) pair — deposits on a chain can only be withdrawn on that same chain.

Query (both optional): currency — USDT | USDC; network — TRX, ETH, BNB, POL, SOL (testnets: TRX_NILE, SEP, tBNB, POL_AMOY, SOL_DEVNET).

Response:

• With BOTH currency and network: the single balance row for that pair — currency, network, available, pending (decimal strings), lastUpdatedAt (zero balances if no row exists yet).
• Otherwise: { balances: [...] } — every balance row the account holds (optionally filtered), each with currency, network, available, pending, withdrawalEnabled, networkFee (current per-chain withdrawal fee, null when withdrawals are disabled for the pair), maxWithdrawable (available minus the network fee, floored at 0), and lastUpdatedAt.

Enabled today: USDT on TRX for deposits and withdrawals; USDT/USDC on BNB (since 2026-09-08) and POL (since 2026-09-09) for deposits, with withdrawalEnabled: false until withdrawals open on each network. Other pairs appear once enabled.

Authentication: Authorization: <API key> — send the raw key (no Bearer prefix required). Bearer <API key> is still accepted for compatibility.