Hi @Bas_F!
Just heard back from our developers and he let me know that this may be happening because you’re sending requests through our “regular” API endpoint https://api.monday.com/v2.
Our alternate endpoint for files is https://api.monday.com/v2/file, however this will only work for our add_file_to_update() or add_file_to_column() mutation methods, which would be a different way of uploading files to an update or column.
For examples on how this is done, I would recommend checking out the following resources:
- https://monday.com/developers/v2#mutations-section-files
- Uploading a file to monday.com with variables - example in NodeJS
There are also plenty of resources and threads in our community on how to do this!