Hook into 'save custom taxonomy' like 'save_post' in WordPress
To answer my own question:
This works:
function pdf_save_magazine($term_id, $tt_id, $taxonomy) { $term = get_term($term_id, $taxonomy); $term_slug = $term->slug; wp_remote_get( 'http://url-that-saves-pdf.com/?print='.$term_slug, array( 'blocking' => false, 'timeout' => 1, 'httpversion' => '1.1' ) );}add_action( 'edit_term', 'pdf_save_magazine', 10, 3 );