Receiving "This app hasn't been reviewed or approved by HubSpot", when trying to install app

[XinleiS]

Hi,
I’m building a private integration using HubSpot’s OAuth app and connecting it to my n8n workflow via webhooks. I’ve followed the full app setup, including:

• ✅Verified my domain (billyapp.live)

• ✅Added redirect URI

• ✅Scopes match the install URL exactly (e.g. crm.objects.deals.read, crm.objects.deals.write, etc.)

• ✅Added full support info (email, docs, phone)

• ✅OAuth install URL is correctly formatted

• ✅Using “HubSpot OAuth2 API” inside n8n

However, when I try to install the app via the OAuth install link, I get this message:

“This app hasn’t been reviewed or approved by HubSpot. Make sure you trust this developer before connecting it to your account.”

Then the connect fails with “Something went wrong. Please try again!” 

This is not a public marketplace app — it’s a private integration for internal use. I don’t need listing or certification, just a working OAuth flow.

Would appreciate any help or clarity on what’s still missing.

my app id: 12562305

my install URL: https://app-eu1.hubspot.com/oauth/authorize?client_id=a6317425-c19f-4361-84b4-0ffd726d38d5&redirect_...

Thanks in advance!

[evaldas · Accepted solution]

Hi @XinleiS,

If you are looking to build a private integration (not a public marketplace app), then you might want to consider a Private App instead:

https://developers.hubspot.com/docs/guides/apps/private-apps/overview

[Sjardo]

Hi! 

Sadly i'm not able to help you out. I came here to say that please do not share your app or client ID on forums. Just for your safety!

Best, Sjardo