The following Python script can be used to get the latest package version from a feed using Azure DevOps REST API’s. For the token, you need to generate a PAT token that at least has permissions to Packaging / Artifacts.
import requests
import base64
import json
def get_latest_package_version(organization, project, feed_name, token):
token = str(base64.b64encode(bytes(':'+token, 'ascii')), 'ascii')
headers = {'Authorization': 'Basic ' + token}
feed = requests.get(f"https://feeds.dev.azure.com/{organization}/{project}/_apis/packaging/Feeds/{feed_name}?api-version=6.0-preview.1", headers=headers)
feed_id = json.loads(feed.text)["id"]
package = requests.get(f"https://feeds.dev.azure.com/{organization}/{project}/_apis/packaging/Feeds/{feed_id}/packages?api-version=6.0-preview.1", headers=headers)
package_version = json.loads(package.text)["value"][0]["versions"][0]["version"]
return package_version
organization = "my-org"
project = "my-project"
feed_name = "my-feed"
token = "*********************************************"
version = get_latest_package_version(organization, project, feed_name, token)
print(version)
Justin Codes 
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