How to get (unread) achievements?

Question

Is there an API call where you can get all achievements and all unread achievements?

Like this:

Update

Thanks to the answer of Glorfindel, I use the following methods to calculate the unread achievements.

Note: I'm using angular 8

notification.service.ts

public getAchievements(options?: IQuestionOptions): Observable<IResponse> {   
  const headers = new HttpHeaders()
    .set('Accept', '*/*');

  const params = new HttpParams()
    .set('key', {{APP_KEY}})
    .set('access_token', {{TOKEN}})
    .set('pageSize', '30')
    .set('page', '1')
    .set('filter', 'O5lYbEN2lExNfdp2Q');

  return this.http
    .get<IResponse>(
      'https://api.stackexchange.com/2.3/', 
      { headers, params }
    );
}

Counting unread items

public countUnread(items: any): number {
  if (!items) {
    return 0;
  }

  return items
    .map(item => item.is_unread ?
      item.reputation_change ?
        item.reputation_change
        : 1
      : 0)
    .reduce((accumulator, currentValue) => accumulator + currentValue);
}

Also to be mentioned is that this method is used for counting unread messages and unread achievements, depending on what was handed over.

Answer 1

• Badges and new privileges are part of the /notifications method, which is a single call for all accounts across the network. The results show whether the notification is unread or not. There's also a separate method just for unread notifications: /notifications/unread.
• For reputation changes, all I know are some site-specific methods (/me/reputation, /me/reputation-history and /me/reputation-history/full). They don't have a read/unread indication. There must be one which does, and provides a network-wide view, since the Stack Exchange mobile apps use them. This question is asking the same: Get reputation changes across all sites without querying each one individually and I found the answer: it's an undocumented API v2.3 method, /me/achievements.