Rates & fees

Midmarket is the mid rate the maker prices from, in USD per coin; Spread is the distance of the firm quote’s price from it, in basis points, for buying the coin with USDC and for selling it. Sizes are on Trade sizes and limits.

What you pay

Cost	Who takes it	How much
Spread	The market maker that signed the quote	Inside the rate. `buyAmount / sellAmount` is the all-in price; its distance from `referenceRate` is the spread in the table above.
Protocol fee	Aile	None today. `fees.bps` and `fees.amount` in every quote read `0`; `fees.recipient` is the zero address.
Gas	You, on Base	A fill uses about 240k gas: about a cent on Base.

There is no subscription, no minimum volume and no charge for quotes you do not fill. Because a quote is a signed order, the rate you see is the rate you get: no re-pricing between the quote and the fill, no slippage tolerance to set. The quote carries referenceRate (the midmarket rate it was priced from) and sellAmount/buyAmount (the exact amounts), so the spread of every quote can be checked.

Midmarket rates

The midmarket rate is the one the maker actually prices from. Today every pair is priced from a public Chainlink feed on Base, read on chain at the moment of the quote. reference.source on each level says which kind of source the rate came from: chainlink for a feed, api for a rate read from live order books.

EURC


Midmarket rate	Chainlink EURC/USD feed on Base, `0x9867…01e0`
Updates	A new round when the rate moves 0.1 % or after 1 hour

XSGD


Midmarket rate	Chainlink SGD/USD feed on Base, `0x8157…949b`
Updates	A new round when the rate moves 0.5 % or after 24 hours: in practice about one print a day

IDRX


Midmarket rate	Chainlink IDR/USD feed on Base, `0x05A6…ef97`
Updates	A new round when the rate moves 0.3 % or after 1 hour

Reading it from the API

curl -s https://app.aile.tech/api/base/v1/levels | jq '.levels[] | {sellToken, buyToken, reference, maxFirmSize}'

reference.rate is the midmarket rate, reference.source its kind (chainlink or api), reference.at its time. No key is needed; the machine-readable form is documented at GET /v1/levels.

Introduction

Integrate

API reference

Reference

Legal & access

Rates & fees

What you pay

Midmarket rates

EURC

XSGD

IDRX

Reading it from the API

​What you pay

​Midmarket rates

​EURC

​XSGD

​IDRX

​Reading it from the API

What you pay

Midmarket rates

EURC

XSGD

IDRX

Reading it from the API