Smartsheet API ---- how to upload an Image to a cell on a sheet, then send it to back-end (to AWS S3, get URL, for MongoDB)

Problem:

• Smartsheet allows users to add images to a cell, by right-clicking on a cell then selecting 'Upload Image'
• We are trying to see how that image could then be sent to our back-end, so that the image is stored in AWS S3, where we get the image URL, so that in turn we can store it in our database, MongoDB

What has been tried so far:

• The entire process described on previous paragraph (i.e. send image to S3 and MongoDB) we've been able to do from a mobile app we developed (in Flutter), the difference is now we are trying to start the image upload from Smartsheet, uploading the image from the cell
• Using the Smartsheet API we've been able to both 'read' and 'write' to our back-end (NodeJS, MongoDB). We have yet to figure out the issue with "uploading Images from the Smartsheet API", is that possible?

Seems like the Cell Images section of the Smartsheet API docs contains the info you're looking for. In particular, you'll probably find the information you're looking for in one or both of the following sections:

• Add Image to Cell - describes how to use the API to add an image to a cell of a sheet.

• Download Cell Image - describes how to use the API to retrieve an image that's stored in the cell of a sheet. `