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Integrate with Coder

Support level: Community

What is Coder?​

Coder is an open-source platform that provides browser-based cloud development environments, enabling developers and teams to securely write, edit, and manage code remotely without the need for local setup.

-- https://coder.com

Preparation​

The following placeholders are used in this guide:

  • coder.company is the FQDN of your Coder installation.
  • authentik.company is the FQDN of the authentik installation.
info

This documentation lists only the settings that you need to change from their default values. Be aware that any changes other than those explicitly mentioned in this guide could cause issues accessing your application.

authentik configuration​

To support the integration of Coder with authentik, you need to create an application/provider pair in authentik.

Redirect URI changes in authentik 2026.5

In authentik versions earlier than 2026.5, all Redirect URIs are automatically treated as Authorization type. If you are using one of these older authentik versions, add only the Authorization URL to your Redirect URIs and do not configure a Post Logout URI.

Create an application and provider​

  1. Log in to authentik as an administrator and open the authentik Admin interface.
  2. Navigate to Applications > Applications and click New Application to open the application wizard.
    • Application: provide a descriptive name, an optional group for the type of application, the policy engine mode, and optional UI settings. Note the Slug value because it will be required later.
    • Choose a Provider type: select OAuth2/OpenID Connect as the provider type.
    • Configure the Provider: provide a name (or accept the auto-provided name), the authorization flow to use for this provider, and the following required configurations.
      • Note the Client ID and Client Secret values because they will be required later.
      • Add a Redirect URI of type Strict Authorization as https://coder.company/api/v2/users/oidc/callback.
      • Select any available signing key.
      • Under Advanced protocol settings, add the authentik default OAuth Mapping: OpenID 'offline_access' scope.
    • Configure Bindings (optional): you can create a binding (policy, group, or user) to manage the listing and access to applications on a user's Application Dashboard page.
  3. Click Submit to save the new application and provider.

Coder configuration​

To support the integration of Coder with authentik, add the following environment variables to your Coder deployment. Set CODER_OIDC_EMAIL_DOMAIN to one or more comma-separated email domains that are allowed to use Coder.

.env
CODER_OIDC_ISSUER_URL="https://authentik.company/application/o/<application_slug>/"
CODER_OIDC_EMAIL_DOMAIN="acme.company,acme-corp.company"
CODER_OIDC_CLIENT_ID="<Client ID from authentik>"
CODER_OIDC_CLIENT_SECRET="<Client Secret from authentik>"
CODER_OIDC_SCOPES="openid,profile,email,offline_access"
CODER_OIDC_SIGN_IN_TEXT="Log in with authentik"
CODER_OIDC_ICON_URL="https://authentik.company/static/dist/assets/icons/icon.svg"

Restart Coder after changing these settings.

Configuration verification​

To confirm that authentik is properly configured with Coder, log out of Coder and log back in by clicking Log in with authentik.

Resources​