Minimum order sizes

v1 (legacy). This page documents the API before the v2 update. The v1 format is not enabled for new accounts and must be enabled on your account by your account manager. New integrations should use the current documentation. To update an existing integration, follow the migration guide.

Minimums on Rio are always in the currency you are receiving. For a buy order, the minimum is in the crypto you are purchasing; for a sell order, it is in the fiat currency you’re selling your crypto for.

Currency	Crypto / Fiat code API	Minimum order size
USDC (Ethereum)	USDC	$1.00 USDC (Ethereum)
USDC (Polygon)	USDC_POLYGON_NXTB	$1.00 USDC (Polygon)
USDC (Solana)	SOL_USDC_PTHX	$1.00 USDC (Solana)
USDC (Stellar)	XLM_USDC_5F3T	$1.00 USDC (Stellar)
USDC (Base)	USDC_BASECHAIN_ETH_5I5C	$1.00 USDC (Base)
USDC (Tempo)	USDCE_TEMPO_MXYR	$1.00 USDC (Tempo)
USDT (Ethereum)	USDT_ERC20	$1.00 USDT (Ethereum)
USDT (Polygon)	USDT_POLYGON	$1.00 USDT (Polygon)
USDT (Tron)	TRX_USDT_S2UZ	$1.00 USDT (Tron)
USDT (BSC)	USDT_BSC	$1.00 USDT (BSC)
Mexican Peso	MXN	$20.00 MXN
Peruvian Sol	PEN	$4.00 PEN
Colombian Peso	COP	$6,000.00 COP
US Dollar (Mexico and Peru)	USD	$10.00 USD

Disclaimer: All technical documentation is subject to the terms and conditions, which apply supplementarily and take precedence over the documentation.

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Minimum order sizes