To check if somebody is banned visit this URL: https://bedrockbans.com/api/bans/their_xuid.json
their_xuid = Put their XUID here.
Response: HTTP Status 200 = Banned, HTTP Status 404 = Not Banned
Example Output:
{ "server-name": "servername", "banned-xuid": 111111111111111, "banned-ip": "1.1.1.1", "banner-xuid": 222222222222222, "banner-ip": "2.2.2.2", "ban-reason": "Chargeback", "ban-time": 1526405133 }