Jq
create list of all keys in array.
curl -sk -H "Authorization: Bearer $(oc whoami -t)" https://$(oc get routes -n openshift-monitoring thanos-querier -o jsonpath='{.status.ingress[0].host}')/api/v1/metadata | jq . echo '{ "data": { "aggregator_openapi_v2_regeneration_count": [ { "unit": "" } ], "alertmanager_alerts": [ { "unit": "" } ] } }' | jq -r '.data | keys | flatten[]' aggregator_openapi_v2_regeneration_count alertmanager_alerts