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Post-Only Orders

This message applies to post-only orders that would have matched immediately. When a post-only order is rejected, the order is not placed on the order book.

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Order Quantity Fields

In the order object, quantity represents the remaining quantity and filledQuantity represents the cumulative filled quantity. The two values will add up to the original order quantity.

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URL

This stream can be subscribed per market and you will need to pass in the market in the URL query. See below.

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Query params

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market
string
required
Example value: ETH-USD. To get all supported markets, call /api/v1/markets endpoint.

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Headers

See Authorization section on how to retrieve authorization token. Once token is received, set Sec-WebSocket-Protocol headers in the WebSocket handshake request or on connect().
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Sec-WebSocket-Protocol
string
required
Example value (authorization token) :
authorization#eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJzdGFnaW5nLmZ1bmdpYmxlLnh5eiIsInN1YiI6ImQxM2I1MzBmLWFmNzMtNDBmOS04ZjhlLWVkNzk1OTU3YTU3ZiIsImF1ZCI6WyJzdGFnaW5nLWFwcC5mdW5naWJsZS54eXoiXSwiZXhwIjoxNzAzMzA1NzQwLCJpYXQiOjE3MDMzMDM5NDB9.vsHe4G_yEkRfz8XNoTKcX83udA-LUysWD4q80wfCC8k

{
    "resultType": "rejectOrder",
    "data": {
        "statusCode": 400,
        "body": "Post-only order rejected as it would have matched immediately",
        "order": {
            "market": "BTC-USD",
            "orderId": "01JGPRJC7KHY8GP4FT6WRQG193",
            "orderType": "sell",
            "tradeType": "limit",
            "price": "98491.86060236",
            "quantity": "15.83767529",
            "filledQuantity": "0",
            "leverage": "1",
            "createdAt": 1746643403628,
            "updatedAt": 1746643403696,
            "orderStatus": "active",
            "clientRequestId": "0835bf3e-4a20-41f0-908d-8213f2b7a285",
            "postOnly": false
        },
        "clientRequestId": "b9fe6677-12c3-4d43-894c-370236b94023"
    },
    "connectionId": "H8D-KebFiYcCJvA="
}