The API is available at https://api.nsn.org.uk/v1/
Documentation homepage https://docs.api.nsn.org.uk/
The example below shows you how to authenticate against the API using python, and hit the /areas endpoint.
If you have an API key, enter it here to populate the examples:
import http.client
conn = http.client.HTTPSConnection("api.nsn.org.uk")
payload = ''
headers = {
'x-api-key': '{your api key} '
}
conn.request("GET", "/v1/areas", payload, headers)
res = conn.getresponse()
data = json.load(res)
print(data)
Documentation homepage https://docs.api.nsn.org.uk/