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You need to pay for Moz to bulk fetch Moz-created metrics. If you have an active Moz subscription with API access, I believe you just have to visit this URL: https://moz.com/products/mozscape/access to get your "Access ID" and "Secret Key". Without these most tools will fail all Moz-related bulk metric fetches. Such tools just provide automation, they don't provide 'free' access to Moz's data