Analytics API 429 on bulk interaction export

I’m trying to figure out why the /api/v2/analytics/interactions/details endpoint returns 429 Too Many Requests almost instantly when JMeter fires 50 concurrent threads. Region is Asia/Singapore. Here is the payload being sent:

{
 "interval": "2023-10-25T00:00:00.000Z/2023-10-25T23:59:59.999Z",
 "groupBy": ["routing.queue.id"],
 "metricFilters": [{
 "name": "abandoned.count",
 "type": "sum"
 }]
}

Rate limiting docs don’t specify a cap for this specific endpoint under high concurrency. Is there a different batching strategy required?