Marketing Cloud Triggered send - error '10004'

Question

I have created a Triggered send definition under trigger sends linked with static email and also linked a data extension based on triggered send template.

    [
            {
    "From": {
        "Address": "[email protected]",
        "Name": "No reply"
    },
    "To": {
        "Address": "[email protected]",
        "SubscriberKey": "[email protected]"


},
    "Options": {
        "RequestType": "SYNC"
    }
  }            ] 

Am hitting the below end point for triggered send: https://host.rest.marketingcloudapis.com/messaging/v1/messageDefinitionSends/key:externalkey/send

Am getting an error like

{
"message": "Problem initating message send during deserialization of JSON payload.",
"errorcode": 10004,
"documentation": ""
}

Please help

Answer 1

You have it in an array.

Try without []

{
    "From": {
        "Address": "[email protected]",
        "Name": "No reply"
    },
    "To": {
        "Address": "[email protected]",
        "SubscriberKey": "[email protected]"
    },
    "Options": {
        "RequestType": "SYNC"
    }
  }

Answer 2

Try like this

{
"From": {
    "Address": "[email protected]",
    "Name": "No reply"
},
"To": {
    "Address": "[email protected]",
    "SubscriberKey": "[email protected]",
    "ContactAttributes": {
        "SubscriberAttributes": {
            "Name": "test"
        }
    }
} 
}