A publication: its numeric id (`89120`), its Substack subdomain (`astralcodexten`), its host (`www.astralcodexten.com`) or its URL. A numeric id is refused with a 400 on the routes that need a subdomain, host or URL.

Order. `oldest` is not supported.

Only posts whose text matches this string.

Only posts in this section id (from the publication's sections).

Page number, 0 to 100,000; leave it at 0 and follow `page.nextCursor`. A page above 0 is refused with a 400 because the archive pages by cursor.

Opaque cursor from the previous page's `page.nextCursor`. Omit it for the first page.

Rows to return, 1 to 23.