Cannot figure out how to configure Slack API credentials (using Access/Verification token)

Ambroise · December 11, 2020, 1:40pm

I get an error when I try using the Verification token

On n8n:

Response:

Problem executing workflow
There was a problem executing the workflow:
"Slack error response: {"ok":false,"error":"invalid_auth"}"

Using OAuth credentials works fine, but normal API credentials is just so complicated to figure out. I basically did the same as in the second video Slack | Docs.

I tried using an existing Slack app and a new one, but got the same issue in both cases.

RicardoE105 · December 11, 2020, 1:44pm

Yes, that does not seem right. The access token is under OAuth & permissions.

Ambroise · December 11, 2020, 1:53pm

Thanks!

I used the token, and then I got another error.

There was a problem executing the workflow:
"Slack error response: {"ok":false,"error":"missing_scope","needed":"chat:write:bot","provided":"incoming-webhook"}"

So, I added a few permissions, such as:

And now everything is working smoothly! Thanks!

RicardoE105 · December 11, 2020, 1:57pm

ah yes, forgot to mention that. Glad that it worked.

Ambroise · December 11, 2020, 2:12pm

@jan Should the docs be updated about that?

RicardoE105 · December 11, 2020, 2:44pm

Yes, just created a internal ticket for it.

christiaanwesterbeek · February 8, 2022, 4:38pm

Since somewhere October 2021, you also need to add scope users.profile:read or else your Slack connection will not work. See: Slack - Scope required

christiaanwesterbeek · February 8, 2022, 4:40pm

Please update that ticket to also mention the required scope users.profile:read