Issue with Uploading Attachment to Zoho Books Invoice via File URL

Hi Pabbly Support Team,

I’m currently trying to upload an attachment to a Zoho Books invoice using your automation platform. I'm sending the File URL (a direct link to the attachment, which is in CSV format) as part of the webhook payload.

However, the file is not being uploaded successfully as an attachment to the invoice. I have tried different formats and ensured the file is accessible via a public URL, but the integration still does not work.

Could you please assist me in understanding how to properly send the file so it is attached to the invoice in Zoho Books? Is there a specific format or method required for this?

Looking forward to your support.

Hi @Maheshwara Reddy,

Could you please share the Workflow URL where you have this concern?

Hi @ArshilAhmad,

I’m working on a workflow here:
Workflow URL: https://connect.pabbly.com/workflow/mapping/IjU3NjYwNTZhMDYzMjA0MzY1MjY0NTUzMjUxM2Ei_pc

I’m trying to upload an attachment to a Zoho Books invoice using the "Add attachment to an invoice" API from Zoho’s documentation:
Zoho API Docs – Add Attachment

The problem is on Step 7 — I’m sending a file URL (Google Drive direct download link), but Zoho Books doesn’t seem to accept it. From their API, it seems the attachment field must be an actual file upload (--form attachment=@"file.pdf") and not just a URL.

Could you please guide me on how to:

1. Download the file from a Google Drive URL inside Pabbly.
2. Pass it to the Zoho Books API as an actual file upload in Step 7.

You won't be able to execute this endpoint using the API (Pabbly) module. You will need to create a custom application. If you need any help creating a custom application, you can contact our integrations team at [EMAIL][email protected][/EMAIL]

thank you.