Bing Image Search API Error 401: Permission Denied

@ib_cheshire Are you are using the resource keys of the bing resource that is available from the marketplace?

I used the keys from this resource in this sample and it returned a response successfully.

# Copyright (c) Microsoft Corporation. All rights reserved.  
# Licensed under the MIT License.  
  
# -*- coding: utf-8 -*-  
  
import json  
import os  
from pprint import pprint  
import requests  
  
'''  
This sample makes a call to the Bing Image Search API with a text query and returns relevant images with data.  
Documentation: https: // video2.skills-academy.com/en-us/azure/cognitive-services/bing-web-search/  
'''  
  
# Add your Bing Search V7 subscription key and endpoint to your environment variables.  
subscriptionKey = "<your_key>"  
endpoint = "https://api.bing.microsoft.com/v7.0/images/search/"  
  
# Query to search for  
query = "puppies"  
  
# Construct a request  
mkt = 'en-US'  
params = {'q': query, 'mkt': mkt}  
headers = {'Ocp-Apim-Subscription-Key': subscriptionKey}  
  
# Call the API  
try:  
    response = requests.get(endpoint, headers=headers, params=params)  
    response.raise_for_status()  
  
    print("\nHeaders:\n")  
    print(response.headers)  
  
    print("\nJSON Response:\n")  
    pprint(response.json())  
except Exception as ex:  
    raise ex