Is it possible to implement Login with Shopify to my non-Shopify app?

Shopify Discussion

Topic summary

A B2B app developer is exploring whether they can implement “Login with Shopify” OAuth functionality for their non-Shopify application, similar to social login options like Google or GitHub.

Current findings:

  • The developer discovered Shopify’s OAuth documentation but notes it appears oriented toward store owners authorizing apps
  • Also found Shopify Multipass, but this seems focused on a different use case

Core question:
The goal is to offer a seamless login experience where existing Shopify users can authenticate to the external B2B app using their Shopify credentials, rather than the typical app authorization flow.

Status: The discussion remains open with no definitive answer yet on whether this specific OAuth implementation is supported or feasible.

Summarized with AI on November 23. AI used: claude-sonnet-4-5-20250929.
1

I’m a developer of a B2B app. We recently got a few customers that use Shopify as their eCommerce platform and I was wondering if it would be possible to allow them to login with Shopify oauth - similar to Github, Google, Apple etc.

I found this https://shopify.dev/apps/auth/oauth but that seems like its about authorizing your app vs what we’d like to do, offer login with Shopify so they don’t need another login

Also https://shopify.dev/api/multipass but that just seems oriented to people that have a store (which we do not, we don’t sell goods)