Hi @Colombia ,

First of all you are right , the documentation seems to be lacking around this call. When I check the Nifi Rest API documentation under (Nifi-Api ) here is what I find for the upload api :

For some reason the Name of all the parameters are not shown ! Not sure if they were missed by mistake or I'm missing something here @MattWho , @steven-matison might know.

After trial and error using Postman I was able to get it working and here is the curl command as provided by postman:

curl --location 'https://{url}:9443/nifi-api/process-groups/17baf155-018c-1000-7bde-586d185d1d0d/process-groups/upload' \
--header 'Content-Type: multipart/form-data' \
--header 'Authorization: Bearer ...' \
--form 'positionX="11.0"' \
--form 'clientId="4036074c-018c-1000-3e06-aaaaaaaaaaaa"' \
--form 'disconnectNode="true"' \
--form 'groupName="testapi"' \
--form 'positionY="557.0"' \
--form 'file=@"/C:/nifi-2.0.0-M1-bin/nifi-2.0.0-M1/test123.json"'

If that helps please accept solution.

Thanks