{
  "endpoints": {
    "/api/check_login": "GET - Check login status",
    "/api/get_token": "GET - Get access token from refresh token",
    "/api/read_mail": "GET - Read email and get verification code",
    "/api/read_mail_by_card": "GET - Read email using card format"
  },
  "service": "Email OAuth2 API",
  "version": "2.0"
}