I have posted this in the Adobe Community also but have not had a reply so I thought I should hit my normal Go-To Community.

I have a Logic App that monitors incoming emails. Some have multiple PDF attachments that I want to merge and save to Dropbox. I have it working with the Encodian API but I want to switch it over to the Adobe API.

I then use the array as input for the Encodian API. When I try this with the Adobe API, I get an error, "bad value for parameter 'files'; invalid type". Doing some research I read somewhere that I should change the fileName line to "$content-type": "application/pdf"

This still returns the same error.

Even though the files were already PDF’s I thought maybe they still needed to be converted to Base64 so I tried that.

The Append array action generates this result:

[
    {
        "$content-type":"application/pdf",
        "fileContent":"SlZCRVJ..."
    },
    {
        "$content-type":"application/pdf",
        "fileContent":"SlZCRVJ..."
    }
]

The error again is: "bad value for parameter 'files'; invalid type".

The full code for the action is:

{
    "inputs": {
        "host": {
            "connection": {
                "name": "@parameters('$connections')['adobepdftools']['connectionId']"
            }
        },
        "method": "post",
        "body": {
            "files": "@variables('FileToMerge')",
            "outputFileName": "Temp.pdf"
        },
        "headers": {
            "x-api-key": "PowerAutomate",
            "x-region-value": "-ue1"
        },
        "path": "/operation/v1/combinePDF"
    }
}

Thank you for any insight that can be provided!