File: slack.md | Updated: 11/15/2025
š NextAuth.js is now part of Better Auth !
Version: v4
On this page
Documentationā
https://api.slack.com/authentication https://api.slack.com/docs/sign-in-with-slack
Configurationā
danger
Slack requires that the redirect URL of your app uses https, even for local development. An easy workaround for this is using a service like ngrok
that creates a secure tunnel to your app, using https. Remember to set the url as NEXTAUTH_URL as well.

Optionsā
The Slack Provider comes with a set of default options:
You can override any of the options to suit your own use case.
Exampleā
import SlackProvider from "next-auth/providers/slack";...providers: [ SlackProvider({ clientId: process.env.SLACK_CLIENT_ID, clientSecret: process.env.SLACK_CLIENT_SECRET })]...