Pricing API suddenly returning 400

Question

We have a HPC cluster finance integration that uses the Microsoft pricing API to pull down the price information for the compute instances.

It has suddenly stopped working.

e.g the following python code will return an error sometimes, but a 200 and the correct response other times:

from requests import get  
response=get("https://prices.azure.com/api/retail/prices?currencyCode='GBP'&$filter=serviceName%20eq%20'Virtual%20Machines'%20and%20serviceFamily%20eq%20'Compute'%20and%20armRegionName%20eq%20'westeurope'%20and%20meterName%20eq%20'F8s%20v2'")  
response.json()  

Can someone please take a look at this as a matter of urgency? Our users currently are unable to run workloads as we can't verify the cost associated.