Add to Pixel Audience via API
We're looking to create a custom pixel audience, so we can exclude users in this audience for 1 day. We're looking to add a user frequency cap basically across certain accounts. This specific implementation doesn't give us the option to fire a pixel, since it's going direct to a landing page we don't have control over. We could add a page in between the landing page and our ads, but we could lose some users that way. Is there a way to post a user to a pixel audience via api?
The reason we're looking to use a pixel audience vs a custom audience is the ability to include a user in the audience for only 1 day, which is available in the pixel audience, and also not having first party user data. What are our best options to add users to this audience via api?