Rest API call to add new POST together with acf fields

• Flaschenzug

• June 22, 2024 at 12:33 am

Hi, I am adding a new post to wordpress using the rest API.
For testing purposes, I am using restninja.io

Adding the post with title and content works perfectly fine.
But when I try to add acf fields, it does not work.

So here is what i tried (different versions):
/wp-json/wp/v2/posts?title=test&content=abc&fields={“productname”: “test”}
/wp-json/wp/v2/posts?title=test&content=abc&acf={“productname”: “test”}
/wp-json/wp/v2/posts?title=test&content=abc&fields={\”productname\”: \”test\”}
/wp-json/wp/v2/posts?title=test&content=abc&fields=[“productname”: “test”]

Adding the post to WordPress works.
However, the ACF field remains empty.

What am I missing / doing wrong ?
Thanks