---
title: Mastodon
<span class="badge badge--secondary">Support level: Community</span>
## What is Mastodon
> Mastodon is free and open-source software for running self-hosted social networking services. It has microblogging features similar to Twitter
>
> -- https://joinmastodon.org/
## Preparation
The following placeholders will be used:
- `mastodon.company` is the FQDN of the mastodon install.
- `authentik.company` is the FQDN of the authentik install.
## authentik Configuration
### Step 1 - OAuth2/OpenID Provider
Create a OAuth2/OpenID Provider (under _Applications/Providers_) with these settings:
- Name : mastodon
- Redirect URI: `https://mastodon.company/auth/auth/openid_connect/callback`
### Step 3 - Application
Create an application (under _Resources/Applications_) with these settings:
- Name: Mastodon
- Slug: mastodon
- Provider: mastodon
## Mastodon Setup
Configure Mastodon `OIDC_` settings by editing the `.env.production` and add the following:
```
OIDC_ENABLED=true
OIDC_DISPLAY_NAME=authentik
OIDC_DISCOVERY=true
OIDC_ISSUER=< OpenID Configuration Issuer>
OIDC_AUTH_ENDPOINT=https://authentik.company/application/o/authorize/
OIDC_SCOPE=openid,profile,email
OIDC_UID_FIELD=sub
OIDC_CLIENT_ID=<Client ID>
OIDC_CLIENT_SECRET=<Client Secret>
OIDC_REDIRECT_URI=https://mastodon.company/auth/auth/openid_connect/callback
OIDC_SECURITY_ASSUME_EMAIL_IS_VERIFIED=true
Restart mastodon-web.service
## Additional Resources
- https://github.com/mastodon/mastodon/pull/16221
- https://forum.fedimins.net/t/sso-fuer-verschiedene-dienste/42
