Mento is a stablecoin protocol on Celo that has native AMM for stablecoins created on the platform. It offers the best price and 0 slippage for any of the Mento stablecoins (there are 5 of them at the moment cUSD, cEUR, cREAL, cKES, eXOF).

Docs how to integrate Mento smart contract can be found here: