Outbound Campaign API 429s during JMeter ramp-up

Does anyone know the specific rate limits for /api/v2/outbound/campaigns?

  • Running JMeter load test from Asia/Singapore.
  • Targeting 100 concurrent POST requests to create campaigns.
  • Hitting 429 Too Many Requests immediately after ramp-up.
  • JMeter config uses 50 threads with 10-second ramp.
  • Beginner here, unsure if this is a hard platform limit or config error.
  • Need to validate campaign creation throughput for scale.