Minimal example to send text with CURL via webhook and display it as a card in Teams?

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Posted on by RZ-13101014-0

Hi experts

I need help with creating a flow to display simple texts sent via CURL from bash script on linux machine in a form of (adaptive) card in my Teams channel.

The command on linux look like this

teams-workflow.sh -t "TITLE" -x "MESSAGE"

and I expect to receive a simple message like this

TITLE

MESSAGE

I have a webook (with new URL), it works. I am sending a preformatted JSON payload in form of adaptive card. However, I fail to display it properly. Either I get an error like this

The execution of template action 'Send_each_adaptive_card' failed: the result of the evaluation of 'foreach' expression '@triggerOutputs()?['body']?['attachments']' is of type 'Null'. The result must be a valid array.

or I see a notification but with some default texts from the card template (defined by me in the flow). I also tried a step in between with the JSON Parse block. The left path in the flow is just to make sure I see some notification when the trigger works. I could not find a way to either "inject" the JSON data directly to the Card using the "Post card in a chat or channel" and its "Adaptive card" attribute, or by recreating the structure of the JSON card in the flow and using the dynamic variables (content, attachment, body, Body, text...) to get the TITTLE and MESSAGE data somehow.

Thanks for any help.

2025-10-13 14_32_17-Double Commander 1.1.26~764.png

2025-10-13 14_31_44-Double Commander 1.1.26~764.png

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Building flows

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developerAJ 4,763 on at

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use when an http request received instead of teams webhook trigger [personal choice]

in this case if you can share the triggerbody it will be helpful

ideally you should be posting this body

{
"type":"message",
"attachments":[
{
"contentType":"application/vnd.microsoft.card.adaptive",
"contentUrl":null,
"content":{
"$schema":"http://adaptivecards.io/schemas/adaptive-card.json",
"type":"AdaptiveCard",
"version":"1.2",
"body":[
{
"type": "TextBlock",
"text": "For Samples and Templates, see [https://adaptivecards.io/samples](https://adaptivecards.io/samples)"
}
]
}
}
]
}

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Tomac 4,048 Moderator on at

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The preformatted Adaptive Card you're building in your bash script is bad.

Please use the Adaptive Card Builder provided by Microsoft to ensure your Adaptive Card is using the correct schema and formatting.

Once you pass a properly built Adaptive Card, your flow should no longer have this error.

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RZ-13101014-0 2 on at

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Hi developer AJ

I tried to send your data (saved into input.txt) using this command

curl.exe -H "Content-Type:application/json" -d @input.txt "https://defaulted0........."

In the workflow details I see the data was obtained correctly (probably) and I can see the body parameters (see screenshots):

{"poster":"Flow bot","location":"Channel","body/recipient/groupId":"f7a1c41a-1943-4830-a93a-caef0c421595","body/recipient/channelId":"19:4fd0caf024004b0b8922df64f94da47c@thread.tacv2","body/messageBody":{"type":"message","attachments":[{"contentType":"application/vnd.microsoft.card.adaptive","contentUrl":null,"content":{"$schema":"http://adaptivecards.io/schemas/adaptive-card.json","type":"AdaptiveCard","version":"1.2","body":[{"type":"TextBlock","text":"For Samples and Templates, see [https://adaptivecards.io/samples](https://adaptivecards.io/samples)"}]}}]}}

However, the card was not generated. Its setting has to be corrected somehow, right?

This is its code view:

{

"type": "OpenApiConnection",

"inputs": {

"parameters": {

"poster": "Flow bot",

"location": "Channel",

"body/recipient/groupId": "f7a1c41a-1943-4830-a93a-caef0c421595",

"body/recipient/channelId": "19:4fd0caf024004b0b8922df64f94da47c@thread.tacv2",

"body/messageBody": "@triggerBody()"

},

"host": {

"apiId": "/providers/Microsoft.PowerApps/apis/shared_teams",

"connection": "shared_teams",

"operationId": "PostCardToConversation"

}

},

"runAfter": {},

"metadata": {

"operationMetadataId": "39f90149-5c21-44c3-9647-f6944215ff93"

}

}

Thanks a lot

Robert

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