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Embed Monad swaps in your app with 0x

Monad Mainnet launches soon on November 24th at 9 AM ET! Get ready now by integrating Monad swaps into your app using 0x.

Monad is a high-performance, EVM-compatible Layer 1 blockchain designed to address the scalability and performance limitations in existing networks with 10k+ TPS and 1 second block finality.

Monad features:​

  • ⚡️ Lightning fast transaction speeds
  • ⛽️ Near-zero gas fees
  • ✅ 100% EVM compatible

0x will aggregate order book liquidity, alongside AMMs, for the deepest liquidity on Monad from Day 1.

0x offers professional-grade APIs that aggregate and enable swaps at the best price on millions of tokens across 150+ DEXes on your favorite EVM-compatible chains. 0x is trusted by Coinbase, Matcha, Phantom, DefiLlama, Robinhood Wallet, and many more.

Get ready for mainnet launch by embedding swaps on Monad testnet (chain id: 10143) with Swap API today.

Resources​

Monad​

Swap API​

Questions?​

Liquidity Sources​

Swap API currently aggregates Kuru, Crystal, Clober, OctoSwap, Atlantis, IziSwap, Intro, Morpheus, LFJ, and Uniswap on Monad.

Try It Out​

Run this cURL request to get a live swap quote for selling 100 WMONAD for USDT:

// Replace "YOUR_API_KEY" with your actual API key from https://dashboard.0x.org/create-account

curl --request GET \
  --url "https://api.0x.org/swap/permit2/quote?sellAmount=100000000000000000000&chainId=10143&sellToken=0x760AfE86e5de5fa0Ee542fc7B7B713e1c5425701&buyToken=0xfBC2D240A5eD44231AcA3A9e9066bc4b33f01149&taker=0xb2d64FA9A19eD9b653b70ae648AA70D1e9547e06" \
  --header "0x-api-key: API_KEY" \
  --header "0x-version: v2"


You will receive a response that looks like this (see API Reference for details):

Expand to see response
{
    "blockNumber": "4207992",
    "buyAmount": "34084",
    "buyToken": "0xfbc2d240a5ed44231aca3a9e9066bc4b33f01149",
    "fees": {
        "integratorFee": null,
        "zeroExFee": {
            "amount": "51",
            "token": "0xfbc2d240a5ed44231aca3a9e9066bc4b33f01149",
            "type": "volume"
        },
        "gasFee": null
    },
    "issues": {
        "allowance": {
            "actual": "0",
            "spender": "0x000000000022d473030f116ddee9f6b43ac78ba3"
        },
        "balance": null,
        "simulationIncomplete": false,
        "invalidSourcesPassed": []
    },
    "liquidityAvailable": true,
    "minBuyAmount": "33744",
    "permit2": {
        "type": "Permit2",
        "hash": "0x150733c60db8fdd8b0a069202a468461f0f2c8b2ea1c3841fe7de7140246b3b1",
        "eip712": {
            "types": {
                "EIP712Domain": [
                    {
                        "name": "name",
                        "type": "string"
                    },
                    {
                        "name": "chainId",
                        "type": "uint256"
                    },
                    {
                        "name": "verifyingContract",
                        "type": "address"
                    }
                ],
                "PermitTransferFrom": [
                    {
                        "name": "permitted",
                        "type": "TokenPermissions"
                    },
                    {
                        "name": "spender",
                        "type": "address"
                    },
                    {
                        "name": "nonce",
                        "type": "uint256"
                    },
                    {
                        "name": "deadline",
                        "type": "uint256"
                    }
                ],
                "TokenPermissions": [
                    {
                        "name": "token",
                        "type": "address"
                    },
                    {
                        "name": "amount",
                        "type": "uint256"
                    }
                ]
            },
            "domain": {
                "name": "Permit2",
                "chainId": 10143,
                "verifyingContract": "0x000000000022d473030f116ddee9f6b43ac78ba3"
            },
            "message": {
                "permitted": {
                    "token": "0x760afe86e5de5fa0ee542fc7b7b713e1c5425701",
                    "amount": "100000000000000000000"
                },
                "spender": "0x07f37e56bc55b7f927807171647c2eee95c78f31",
                "nonce": "2241959297937691820908574931991589",
                "deadline": "1740090601"
            },
            "primaryType": "PermitTransferFrom"
        }
    },
    "route": {
        "fills": [
            {
                "from": "0x760afe86e5de5fa0ee542fc7b7b713e1c5425701",
                "to": "0xfbc2d240a5ed44231aca3a9e9066bc4b33f01149",
                "source": "Uniswap_V2",
                "proportionBps": "10000"
            }
        ],
        "tokens": [
            {
                "address": "0x760afe86e5de5fa0ee542fc7b7b713e1c5425701",
                "symbol": "WMON"
            },
            {
                "address": "0xfbc2d240a5ed44231aca3a9e9066bc4b33f01149",
                "symbol": "USDT"
            }
        ]
    },
    "sellAmount": "100000000000000000000",
    "sellToken": "0x760afe86e5de5fa0ee542fc7b7b713e1c5425701",
    "tokenMetadata": {
        "buyToken": {
            "buyTaxBps": "0",
            "sellTaxBps": "0"
        },
        "sellToken": {
            "buyTaxBps": "0",
            "sellTaxBps": "0"
        }
    },
    "totalNetworkFee": "14851462500000000",
    "transaction": {
        "to": "0x07f37e56bc55b7f927807171647c2eee95c78f31",
        "data": "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",
        "gas": "264026",
        "gasPrice": "56250000000",
        "value": "0"
    },
    "zid": "0xa0816374f4eca88cea608f3c"
}

FAQs​

Below are some commonly asked questions about Monad. For a full list of 0x FAQs, see here.

What is the chain ID for Monad Testnet?

Monad Testnet's chain ID is 10143. See all our supported chains.

What's the Monad Testnet Explorer?
What tokens can I use for testing on Monad Testnet?

Try one of the top tokens listed here: https://testnet.monadexplorer.com/tokens

Note the following:

  • Testnet liquidity is more limited than on mainnet
  • Liquidity sources are also different between mainnets and testnets
  • Not all pairs on mainnet are deployed on testnet, so the token pair availability is more limited
  • Be aware that token you want to use for testing must have liquidity on at least one of the liquidity /sources; otherwise, you will receive an error.
Which other chains does 0x support?
Help, my 0x transaction reverted! How can I troubleshoot?

If your 0x quote is reverting, besides the standard revert issues related to ETH transactions, we recommend checking the following are set correctly:

  • Are allowances properly set for the user to trade the sellToken?
  • Does the user have enough sellToken balance to execute the swap?
  • Do users have enough to pay the gas?
  • The slippage tolerance may be too low if the liquidity is very shallow for the token the user is trying to swap. Read here for how to handle this.

For more details on addressing common issues, read 0x FAQ & Troubleshooting

In my app flow, the transaction will need to be signed by a smart contract rather than an EOA. Do you have recommendations for how to implement this?