Create a gasless order

The order endpoint is used to submit a UniswapX intent. If the routing field in the response to a quote is any of DUTCH_V2, DUTCH_V3, LIMIT_ORDER, or PRIORITY this endpoint is used to submit your order to the UniswapX protocol to be filled by the filler network. These orders are gasless because the filler will pay the gas to complete the transaction.

The order will be validated and, if valid, will be submitted to the filler network. The network will try to fill the order at the quoted startAmount. If the order is not filled at the startAmount by the deadline, the amount will start decaying until the endAmount is reached. The order will remain open until it is either filled, canceled, or has expired by remaining unfilled beyond the decayEndTime.

For simplicity, the order request is identical to the quote response except for the addition of the signed permit.

Native ETH on UniswapX: If the quote you are submitting uses native ETH as the input token (e.g. tokenIn is 0x0000000000000000000000000000000000000000), include x-erc20eth-enabled: true. Native ETH input on UniswapX requires wallet support for EIP-7914 and sufficient native allowance. For 7702-delegated smart contract wallets, you can generate the required approval call(s) via /swap_7702 when needed.

Get a UniswapX QuoteThis endpoint requires a signed UniswapX order. A Dutch auction quote will be fetched, but you'll need to sign the order with your wallet to submit it.

Authorization

x-api-keystringrequiredheader

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Headers

x-erc20eth-enabledbooleandefault:false

Enable native ETH input support for UniswapX via ERC20-ETH (EIP-7914). When set to true and tokenIn is the native currency address (e.g. 0x0000000000000000000000000000000000000000), the API may return UniswapX routes that spend native ETH for supported wallets.

Body

application/json

signaturestringrequired

The signed permit.

routingenum

CLASSICDUTCH_LIMITDUTCH_V2DUTCH_V3BRIDGELIMIT_ORDERPRIORITYWRAPUNWRAPCHAINED

The routing for the proposed transaction.

POST/order

Request

curl --request POST \
  --url 'https://trade-api.gateway.uniswap.org/v1/order' \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --header 'x-erc20eth-enabled: false'