Requesting a Quote

Endpoint

GET /quote

Auth: requires an API key with quote access. Returns the best route, expected output, route legs, platform fee, estimated network fee, and an executable transaction for an exact-input swap.

Required parameters

Param	Description
sell_token	Token symbol or token address.
buy_token	Token symbol or token address.
sell_amount	Human decimal sell amount, for example 0.01.
taker	Non-zero wallet address that will receive output.
slippage_bps	Max slippage in basis points. 50 means 0.50%.

slippageBps is also accepted as an alias for slippage_bps.

Optional parameters

Param	Description
chain_id	Chain id. Defaults to the server’s configured chain.
max_hops	Route-depth hint; final route policy is controlled server-side.
permit2_owner	Non-zero Permit2 token owner for gasless or relayed ERC20 swaps. For gasless, this must equal taker. Also accepts permit2Owner and permitOwner.
swap_fee_bps	Integrator fee in basis points. Requires an integrator key.
swap_fee_token	Optional fee-token hint. Fees are charged in the token Rialto selects.
swap_fee_recipient	Ignored. The payout wallet is bound to the API key.

Example

API_KEY='rialto_live_example.redacted_secret'

curl -sS 'https://rialto-trade-api.rialto.xyz/quote?sell_token=WETH&buy_token=USDC&sell_amount=0.01&taker=0x1111111111111111111111111111111111111111&slippage_bps=50' \
  -H "Authorization: Bearer $API_KEY"

Key response fields

Field	Description
chain_id	Chain id for the quote.
quote_id	UUID handle for the server-stored quote. Bound into the Permit2 witness as a bytes32 quoteId, so the signature is tied to this exact quote.
settlement	Execution mode: permit2 or allowance.
tx	Ready-to-send transaction object. In direct flow, send this from the taker wallet after any required approval or signature step. In gasless flow, Rialto submits this transaction after /gasless/submit.
permit2	EIP-712 typed-data payload. Present only for Permit2 settlement. For gasless quotes, permit2.owner is the token owner that must sign.
issues	Frontend blockers and execution hints for balance and allowance.
sell_token	Sell token address.
buy_token	Buy token address.
sell_amount	Raw integer sell amount in token smallest units.
buy_amount	Expected raw integer buy amount before slippage.
min_buy_amount	Slippage-protected raw minimum buy amount encoded into tx.data.
platform_fee	Platform fee breakdown.
integrator_fee	Present when an integrator fee was accepted for this key.
referral / referral_fee	Present when referral attribution or referral fee policy applies.
network_fee	Estimated transaction gas cost, if available.
taker	Recipient/taker address.
slippage_bps	Slippage tolerance used for quote.
route.legs	Ordered route legs and pools.

The issues object

Inspect issues before submitting. It flags conditions that should block or gate execution.

Field	Meaning
issues.balance	Non-null when the taker lacks enough sell-token balance. Do not submit.
issues.allowance	Non-null when an ERC20 approval is needed before submitting tx. Approve issues.allowance.spender for at least sell_amount.
issues.simulationIncomplete	true when the backend could not complete all quote simulation checks.
issues.invalidSourcesPassed	Reserved field; currently an empty array.

Notes

Quotes depend on live liquidity and can go stale quickly. Request a fresh quote if the user waits. The exact amounts and route legs depend on live liquidity at request time. The next page covers how to execute the returned transaction.

​Endpoint

​Required parameters

​Optional parameters

​Example

​Key response fields

​The issues object

​Notes