Roissingue – API for on-chain swap

Integration in a minute

One API call gives you the best available execution across decentralized exchanges and blockchains. We handle routing, multi-step bridging, gas abstraction, and transaction execution. You focus on building.

const res = await fetch("https://api.roissingue.com/quote", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    fromToken: {
      chainId: 10, // Optimism
      address: "0x0b2C639c533813f4Aa9D7837CAf62653d097Ff85" // USDC
    },
    toToken: {
      slug: "wrapped-ethereum" // Best route for WETH on any chain
    },
    feeToken: {
      chainId: 10, // Optimism
      address: "0x0b2C639c533813f4Aa9D7837CAf62653d097Ff85" // USDC
    },
    allowChains: [10, 8453],
    amount: "100000", // 0.1 USDC
    fromAddress: "0x6eBf2153f931334714984c7F5a8E574207927Cc7",
    toAddress: "0x6eBf2153f931334714984c7F5a8E574207927Cc7"
  })
});