Discord app
Check DonutSMP prices without leaving Discord. Type /price, pick an item and everyone in the chat sees the answer.
/price item:elytraShows the cheapest price, the best buy order, this week's change, how many are listed and a link to the full page. /history draws a candle chart of an item's price. Both cover every server we track, and /default-server sets the one they use for you.
Add it to your account to use it in any server or DM, or add it to a server you run for everyone there. It only adds the command and can't read your messages.