The QA API is simple, and is based on the query string. Pass in type=qa-releases (the only type currently), along with the desired format (serialize or json).

Example URLs:

• All information, serialized: https://qa.php.net/api.php?type=qa-releases&format=serialize
• Only dev version numbers, json: https://qa.php.net/api.php?type=qa-releases&format=json&only=dev_versions