You can add a card that is not listed in Stocard as "Other Card".
We will automatically generate a default logo for all your custom cards. However, you can change this icon by opening the card and clicking on "Edit". Now you have the option to "Add Card Icon" (Android) or "Change Image" (iOS). You could for example use the card provider's logo so that your custom cards look similar to the cards you added via our database.
Tip: You are more than welcome to suggest new cards to be listed in Stocard. Just drop us a note via firstname.lastname@example.org.