Bot API 429 on High Concurrency JMeter Test

Does anyone know the exact concurrent session limit for the Bot API before it starts throttling?

Running JMeter with 100 threads hitting /v2/ai/bot/instances results in immediate HTTP 429 responses. The error payload says “Rate limit exceeded” but we are well below the documented 1000 requests per minute. Need to know if the WebSocket handshake counts toward the limit or if this is a separate constraint. Environment is Genesys Cloud US-East. JMeter config attached.