Platform API 429 errors on /api/v2/architect/flows during JMeter load test

Trying to understand why /api/v2/architect/flows returns 429 Too Many Requests immediately when JMeter 5.6.2 threads hit 50 from Singapore.

  1. Run JMeter script with 50 concurrent users.
  2. Send GET requests to /api/v2/architect/flows.
  3. Requests fail after 10 seconds with 429 status.

Need to know the exact rate limit for this endpoint.