You must be authenticated and/or provide a valid API key to access the resource.
Check that the API key you provided is a valid one and check that it is correctly set in the headers.
See here how to set the API key.
If the API key is correctly set and is valid, the problem probably comes from the credentials.
Check that the credentials are correctly set and are valid. See here how to authenticate.
The requested resource has not been found.
Check that the URL that you provided is correct. See the page of the API endpoint you are trying to contact.
You have have made a lot of API request and you have exceeded the rate limit.
By default, you can send 10 request in a 20 seconds window.
Wait until the time window is reset.
Something is broken on our side.
The are currently no custom codes.