Your author area gives you a development key for each of your products. It works on any domain, opens only your own products, and always reports essai — so an install running on it shows a development notice and can never be mistaken for a sold copy.
To see how your product behaves when it is refused, send a key that does not exist. You get a real signed refusal, which is exactly what a revoked key looks like — so you can check your error screen without revoking anything.
curl -X POST https://addonsmarket.com/api/licence \
-H 'Content-Type: application/json' \
-H 'User-Agent: MonProduit/1.0' \
-d '{"cle":"cettecleNexistePas000000","url":"boutique.exemple.fr"}'
{"donnees":{"ok":false,"motif":"inconnue", …},"signature":"…"}
Write to us from your author area. A question that needed asking usually means this page is missing a paragraph.