It appears the current version no longer works as Qualys SSL Labs has started responding with "STATUS: 529 ERROR: the service is overloaded." for v3 API calls. I suspect it's a result of the v3 -> v4 API change announced in October 2023:
https://notifications.qualys.com/api/2023/09/28/introduction-of-api-v4-for-qualys-ssllabs-and-deprecation-of-api-v3