403: Your client does not have permission to get URL /api/token from this server.

[HardstyleTop40]

Plan

Premium

Country

NL (account), server is in DE

Device

Server (client_credentials) via nodejs

Operating System

Ubuntu 22.04

My Question or Issue

Im connecting my app locally on my dev machine and all goes fine. However when i copy all content to my production server im getting 403 responses:
Your client does not have permission to get URL /api/token from this server.

Network info:

IP: 116.203.246.165 / 2a01:4f8:1c1a:fdd9::/64

App:

1ffd8fb2077b4119aabba0c909d03d32

[Ximzend]

Hi @HardstyleTop40

Did you update the Redirect URI in your app and add it to the Dashboard of your app?

[HardstyleTop40]

Yes there is a redirect uri specified but its a client_credential flow that does ofc does not consume a callback in its oauth flow?

[HardstyleTop40]

The funny thing is, what i request it manually via the CLI all goes fine:

curl -X POST "https://accounts.spotify.com/api/token" \
-H "Content-Type: application/x-www-form-urlencoded" \
-d "grant_type=client_credentials&client_id=1ffd8fb2077b4119aabba0c909d03d32&client_secret=***"

So no clue what Spotify is complaining about actually on the client. It seems that my outbound traffic towards Spotify is blocked? Other service are accessible without any issues. 

The request is made via a docker container on my host machine.

[HardstyleTop40]

I managed to find a workaround. Added "network_mode: host" (linux only) to my compose.yml

However this gives all kinds of weird unwanted sidefx so i guess this is something Spotify should handle here?