Hey guys, For some reason, the authentication isn’t successful (but only restricted) unless I give it full consent, including sending emails and stuff. How do I limit it only to read, labels, body, and stuff of READ-ONLY? Thanks..

As @withabdul said, even though your Google Cloud project is correctly limited to read-only scopes, the built-in Gmail credential in n8n automatically injects additional scopes like gmail.modify and gmail.compose. If you don’t accept them, Google throws a 403 error. Go to Credentials → New → OAuth…

Hello @sondre n8n’s default Gmail credential includes full access scopes. To limit access: Use a Service Account (with domain-wide delegation) for secure, read-only email access. Or configure a custom OAuth2 credential and list only the specific read-only scopes.

Thanks, this is what I did, as you can see here: [image] But as soon as I press the “sign in”, and select the user, it only works if I grant full permission. Otherwise it says forbidden 403 error.

Thank you very much for you answer. If I understand correctly, I’d need to create some HTTP Request for each operation: read messages, labels, modify labels, create a label, right? It makes me create these commands that are already fulfilled within the GMAIL API. If so, I don’t get why the Gmail…

The nodes created by the vendors have been set up to have quick actions without the use of code, but they are limited and have well-defined boundaries. They are used for quick actions and to expand the use of n8n even to less technical people. That’s why there are HTTP nodes that give you the free…

How to set Gmail OAuth for ONLY READ?

Questions

withabdul July 7, 2025, 1:36am 4

you need to create custom OAuth2 credential for your problem.

How to refreshing oauth2

Topic		Replies	Views
How to Restrict OAuth Scopes for Gmail in n8n to Only gmail.send Questions	1	225	July 6, 2025
Google OAuth verification with Gmail node: how do you pass verification when GmailOAuth2Api forces 6 scopes? Questions	2	174	July 18, 2026
Send emails from a user's own Gmail account Help me Build my Workflow	0	80	July 3, 2025
Microsoft Outlook OAuth2 API - Least permissions Questions	4	815	August 27, 2025
Error 400: invalid_scope when setting up OAuth2 for Gmail Questions	3	626	January 22, 2025

How to set Gmail OAuth for ONLY READ?

Related topics