Jira Cloud → ServiceNow Integration | Attachments not syncing via REST API (Demo Instances)

[Hari Krishna]

Hi everyone,

I’m currently working on a Jira Cloud to ServiceNow integration where issues, comments, and updates sync both ways.

So far, I have successfully configured:

Issue creation from Jira → ServiceNow

Comment sync

Field updates

All of these are working fine using Jira Automation + ServiceNow REST APIs.

However, the only part that’s not working is attachments.

I’ve tried multiple approaches, including:

Sending attachments through Jira Automation with {{attachment.content}}

Receiving them on ServiceNow via Scripted REST API

Writing a custom script to decode and attach the files

The automation runs fine, and logs in ServiceNow confirm the API is triggered, but:

The attachments are not actually getting downloaded or saved on the ServiceNow side

The file body sometimes appears as empty (⚠ Empty file body)

Both Jira and ServiceNow are demo/developer instances

What I’m looking for:
A confirmed working approach (or example script) to transfer attachments from Jira Cloud to ServiceNow using automation and REST APIs (no IntegrationHub).

If anyone has configured this successfully in a demo/dev setup, I’d really appreciate your guidance or a sample payload or script snippet.

Environment Details:

Jira Cloud (Automation rules + Webhooks)

ServiceNow Developer Instance

Using Scripted REST API in ServiceNow (no IntegrationHub or MID Server)

Thanks in advance for any help.
— Hari