Signaturgruppen Broker – AI Optimized Integration Reference

(Work in progress - testing)

This document provides a simplified and developer-friendly overview of how to integrate with Signaturgruppen Broker for MitID authentication.

🔐 MitID Authentication Flow

1. Redirect user to authentication

Initiate login by redirecting the user to Signaturgruppen’s authorization endpoint in PreProduction (PP):

GET https://pp.netseidbroker.dk/op/connect/authorize

With the following parameters:

  • client_id: shared or issued client ID
  • redirect_uri: your registered redirect URI
  • response_type=code
  • scope=openid mitid
  • state: anti-forgery token
  • nonce: for replay protection

2. User authenticates using MitID

The user is guided through the MitID login process via the MitID app or other method. On success, the user is redirected to your redirect_uri with:

  • code
  • state

3. Exchange code for tokens

To exchange the code for tokens, call the token endpoint:

POST https://pp.netseidbroker.dk/op/connect/token

With application/x-www-form-urlencoded payload:

  • grant_type=authorization_code
  • code: the authorization code received
  • redirect_uri: same as above
  • client_id
  • client_secret

Example token response: 

{
  "access_token": "...",
  "id_token": "...",
  "refresh_token": "...",
  "expires_in": 300,
  "token_type": "Bearer"
}

Make sure to validate the id_token (JWT) properly.

📌 Tips & Support

Get started for free

Customers can set up their first MitID login flows in PreProduction (PP) completely free of charge — no need for dedicated credentials initially.

Signaturgruppen provides shared client_id and client_secret values that can be used directly for testing purposes in PP.
This allows you to quickly begin integration and try out the login flow without needing a prior agreement or custom configuration.

When you’re ready for dedicated credentials

Once you’re ready to use your own credentials — whether in PreProduction (PP) or Production (PROD) — you can contact Signaturgruppen to have them issued.

📧 Contact: support@signaturgruppen.dk
Please include your CVR number and a brief description of your setup or test environment.

Signaturgruppen’s support team will assist you in obtaining your own client_id and client_secret, enabling you to move toward production or more realistic test scenarios.

🔗 Related Documentation