AWS CLI

Query all SSM parameters that have a prefix “/sandbox/sandbox” recursively; JQuery by parameter 'Name'; Delete the resulted list 

$aws ssm get-parameters-by-path --path '/sandbox/sandbox/' --recursive | jq '.Parameters[].Name' | xargs -L1 -I'{}' aws ssm delete-parameter --name {}

Export parameters from SSM params to a json file:

$aws ssm get-parameters-by-path --path "/sandbox/" --recursive --with-decryption --query "Parameters[*].{Name:Name,Value:Value}" > OutputFileName.json