Filter out posts based mostly on a sure post_meta on the WordPress REST API

So I’ll clarify this one of the simplest ways doable, and see if somebody may be capable of assist me out.

Web site 1 (Posts positioned right here):

For instance that our WordPress REST API endpoint is: https://example-1.com/wp-json/v2/posts

Because the native v2/posts endpoint would not assist post_meta, I added assist utilizing the next:

add_filter('rest_post_query', perform($args, $request) {
    $args += [
        'meta_key' => $request['meta_key'],
        'meta_value' => $request['meta_value'],
        'meta_query' => $request['meta_query'],
    ];

    return $args;
}, 99, 2);

Now, I’m able to efficiently question the REST API utilizing the next endpoint: https://example-1.com/wp-json/wp/v2/posts?web page=1&meta_key=original_id

I efficiently get all posts which have a original_id because the post_meta over the WordPress REST API.

Web site 2 (Pulling in posts from web site #1):

Now, on this web site I need to pull in ALL posts EXCEPT posts which have the post_meta of original_id.

So I’ve the next code:

$response = wp_remote_get(
    https://example-1.com/wp-json/v2/posts?web page=" . $page_number . "&meta_key=original_id'
);

This pulls in ONLY the posts with the original_id post_meta.

Query:
How would I be capable of do the other of that wp_remote_get name? Pull in all posts besides posts which have original_id because the post_meta.

Since I added meta_query assist to the REST API, how would I be capable of make the most of that?