Agent Scripting POST 429 at 5 RPS

Can anyone clarify the rate limit for POST /api/v2/scripts?

Background

Running JMeter 5.6.2 against Genesys Cloud BYOC Edge 24.1.0 in Asia/Singapore. Testing basic script creation throughput.

Issue

Receiving 429 Too Many Requests immediately after hitting 5 requests per second. No custom headers sent.

Troubleshooting

Verified API key permissions. Checked for existing scripts. Retried with lower concurrency but same limit applies. Is this a hard cap for this endpoint?