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Power Platform Community / Forums / Copilot Studio - General / Generating Images with...
Copilot Studio - General
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Generating Images with Azure OpenAI from Power Automate / Copilot Studio (gpt-image-1)

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Posted on by LucaSain 13

Hi guys,

 

I wanted to generate images from Copilot Studio, but I noticed this feature isn’t currently supported (it works in Copilot Studio Lite, though). So, I started researching alternatives using Azure AI Foundry and the Azure OpenAI Image API.

 

Here’s what I learned:

 

Why Azure OpenAI?

 

I can get OpenAI models to do Image Edits using an API directly in Azure, if you have an HuggingFace or Gemini API 🍌 you could use it 

 

How I Integrated It with Power Automate/Copilot Studio


  1. Create an Azure OpenAI resource in AI Foundry and enable the gpt-image-1 model.

  2. Get your endpoint and API key from Azure.

  3. In Power Automate, add an HTTP action:

    • Method: POST

    • URI: https://<your-resource>.openai.azure.com/openai/v1/images/edits

    • Headers: 
      Authorization: Bearer <your-key>

    • Body: Use Form-data mode (recommended) and add:

      • image[] → File Content (from trigger or SharePoint)

      • prompt → e.g., an icon of a beef steak

      • model → gpt-image-1

      • size → 1024x1024

      • quality → medium

      • output_format → png

      • output_compression → 100

      • n → 1


        •  


      •  
{
  "$content-type": "multipart/form-data",
  "$multipart": [
    {
      "body": {
        "$content": "@{triggerBody()?['file']?['contentBytes']}",
        "$content-type": "image/png"
      },
      "headers": {
        "Content-Disposition": "form-data; name=\"image[]\"; filename=\"file.png\""
      }
    },
    {
      "body": "an icon of a beef stake",
      "headers": {
        "Content-Disposition": "form-data; name=\"prompt\""
      }
    },
    {
      "body": "gpt-image-1",
      "headers": {
        "Content-Disposition": "form-data; name=\"model\""
      }
    },
    {
      "body": "1024x1024",
      "headers": {
        "Content-Disposition": "form-data; name=\"size\""
      }
    },
    {
      "body": "1",
      "headers": {
        "Content-Disposition": "form-data; name=\"n\""
      }
    },
    {
      "body": "medium",
      "headers": {
        "Content-Disposition": "form-data; name=\"quality\""
      }
    },
    {
      "body": "100",
      "headers": {
        "Content-Disposition": "form-data; name=\"output_compression\""
      }
    },
    {
      "body": "png",
      "headers": {
        "Content-Disposition": "form-data; name=\"output_format\""
      }
    }
  ]
}
 
 
 
the body part can be: 
      "body": {
        "$content": "@{triggerBody()?['file']?['contentBytes']}",
        "$content-type": "image/png"
      },
or
 
 

Power Automate will handle the multipart boundaries automatically.

 

 

Some issues that I experiment


  • Don’t use JSON body with Content-Type: application/json. The API requires multipart/form-data.

  • Avoid base64ToString()—send the Base64 content directly from Get file content.

  • If you see 400 Bad Request, check that your headers and body format match the API requirements.
 
Sources:
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