## TL;DR

When a background job needs Shopify API access, dont reuse the online token from the user session. Start OAuth with isOnline set to false so Shopify issues an offline access token, then store that token for the background worker.

## Steps

1. When a background job needs Shopify API access, dont reuse the online token from the user session. Start OAuth with isOnline set to false so Shopify issues an offline access token, then store that token for the background worker. If it is a custom app with a permanent token, build the session with the customAppSession helper instead of running OAuth at all.

## When to use

You are seeing this: For custom apps, the session helper customAppSession builds the session directly. Use this skill when you run into "Shopify: request offline access tokens for background jobs via isOnline false".

## When not to use

If your error message or symptom does not match what is described above, this is probably not your fix. Search for your exact error text instead of forcing this one to fit.

## Versions

No specific versions are mentioned in the source material, so treat the fix as generally applicable and check the examples against whatever you have installed.

## Why this happens

The original report does not dig into a root cause. It documents the symptom and the fix that resolved it.