Access the Yoast Seo details

I'm using 'wp-api-angular' to fetch all the post data. Well, it works perfectly, but the major concern for any website is the SEO part. I'm using YOAST SEO plugin. I want to fetch all the Meta tags it creates in the Head section of HTML.

FYI I'm using WordPress as Backend and created a theme in Angular 5  and set as the default theme.

Any pointer will really helpful..