7a8f0515_Stock_Photo_API___Shutterstock__Description
[Code] 403 [Name] Forbidden [Description] 
You are forbidden from viewing or modifying this resource. Providing HTTP credentials will not correct the problem. We have correctly identified your API client, but this client is not currently allowed access to this resource. This is usually due to the fact that the requested resource belongs to a specific user, and your API client has not provided a valid auth_token for that specific user, or the auth_token your client provided has expired. The auth_token is not the same as the "Authorization" header mentioned in the description of response code 401. An auth_token is another level of authentication which is required for some resources. It is also possible that some API clients may not be allowed access to some resources, even on behalf of a valid customer or submitter with a valid auth_token. For instance, an API client used by customers only might not have access to an admin resource.
Stock Photo API - Shutterstock
Description