由于近期API进行了一些变更，对于自建反代的用户，请修改您的Nginx配置以适配。
参考配置如下：

upstream origin-leo {
        server api.nxtrace.org:443;
        keepalive 300;
}

map $http_upgrade $connection_upgrade {
    default upgrade;
    '' close;
}

server {
        listen 443 ssl http2;
        listen [::]:443 ssl http2;
        ssl_certificate /path/to/your/cert.pem;
        ssl_certificate_key /path/to/your/key.key;
        server_name api.example.com;

        location / {
                proxy_pass https://origin-leo;
                proxy_ssl_server_name on;
                proxy_ssl_name origin-fallback.nxtrace.org;
                proxy_ssl_protocols TLSv1.3;
                proxy_http_version 1.1;
                proxy_set_header Upgrade $http_upgrade;
                proxy_set_header Connection $connection_upgrade;
                proxy_set_header Host origin-fallback.nxtrace.org;
                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        }
}