Pennylane API relies on rate limits to ensure stability and reliability. Rate limiting is enabled on both production and sandbox environments and all endpoints are affected.

You are allowed to make 4 API calls (requests) per second.
This applies to all endpoints except one, /api/external/v1/customer_invoices where you are allowed to make 2 API calls (requests) per second.
If you go over this limit, you will receive a 429 HTTP Error :

You made too many requests. Retry in 60s !