I’m trying to upload atttachments from an email to an Asana task using n8n. I’ve managed to extract the email to create a new task and the binary data for the attachments, but I’m struggling getting Asana to accept the data.
I’m using the POST method and URL of https://app.asana.com/api/1.0/attachments
Any ideas? I’m really stuck.
Hey Luis, have you found a solution ? thanks !
@Luis_Molina, Asana’s POST /attachments endpoint only works if you send the file as multipart/form-data with these fields:
file → the binary file (not base64, unless you first decode it back to binary)
parent → the task GID the attachment belongs to
In n8n’s HTTP Request node:
1. Change Content-Type to multipart/form-data (let n8n set it automatically).
2. Add a field parent with the task ID.
3. Add a field file and point it to your binary data (under “Send Binary Data” in n8n).
Reference: Asana API – Upload Attachments( You can explore this for more details)
Without multipart, Asana will reject the request.
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