Create an offer

This endpoint is used to create a new offer on the Seaport contract.

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Requests to this endpoint require an API key. If you don't have an API key, please request one.

Please refer to the Orders Parameter Model for more type definitions on the order parameters for this endpoint. For more background on what each field is, please see the Seaport Overview

Important notes on constructing programmatic offers:

the offer array must have exactly one item, and it must be a currency. We do not support offering multiple currencies.
the consideration array must have exactly two or three items. The items are (in order): the asset (nft), the OpenSea fee, and an optional collection fee
conduitKey is OpenSea's conduitKey: 0x0000007b02230091a7ed01230072f7006a004d60a8d4e71d599b8104250f0000
the provided signature must be valid and signed
startTime and endTime are in Epoch format
orderType must be open
zone is 0x004C00500000aD104D7DBd00e3ae0A5C00560C00
zoneHash is 0x0000000000000000000000000000000000000000000000000000000000000000

{
    "parameters": {
        "offerer": "0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266",
        "zone": "0x004C00500000aD104D7DBd00e3ae0A5C00560C00",
        "zoneHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
        "startTime": "0",
        "endTime": "1656044994000",
        "orderType": 0,
        "offer": [
                    {
                "itemType": 0,
                "token": "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
                "identifierOrCriteria": "0",
                "startAmount": "10000000000000000000",
                "endAmount": "10000000000000000000",
            },
        ],
        "consideration": [
            {
                "itemType": 2,
                "token": "0x0165878A594ca255338adfa4d48449f69242Eb8F",
                "identifierOrCriteria": "1",
                "startAmount": "1",
                "endAmount": "1",
                "recipient": "0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266"
            },
            {
                "itemType": 0,
                "token": "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
                "identifierOrCriteria": "0",
                "startAmount": "250000000000000000",
                "endAmount": "250000000000000000",
                "recipient": "0x70997970C51812dc3A010C7d01b50e0d17dc79C8",
            },
            {
                "itemType": 0, 
                "token": "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
                "identifierOrCriteria": "0",
                "startAmount": "500000000000000000", # Collection Fee
                "endAmount": "500000000000000000",
                "recipient": "0x8a90cab2b38dba80c64b7734e58ee1db38b8992e",
            },
        ],
        "totalOriginalConsiderationItems": 2,
        "salt": 12686911856931635052326433555881236148,
        "conduitKey": "0x0000007b02230091a7ed01230072f7006a004d60a8d4e71d599b8104250f0000",
        "nonce": 0,
    },
    "signature": "0x",
  "protocol_address": "0x00000000000001ad428e4906aE43D8F9852d0dD6",
}