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

Trying to understand why getting 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/flows/{flowId}.
  3. Requests fail after 10 seconds with 429 status.

Need to know the exact rate limit for this endpoint.