There is no official announcement of Pinterest API.
But some people find some undocument v3 API.
- https://api.pinterest.com/v3/pidgets/boards/highquality/travel/pins/
( https://api.pinterest.com/v3/pidgets/boards/[USERNAME]/[BOARDNAME]/pins/ ) - https://api.pinterest.com/v3/pidgets/users/USERNAME/pins/