To receive an API key, you will need to create a PLOS Journals account. Please go to the PLOS Article-Level Metrics and click on “Create Account”. After creating a PLOS Journals account, you can sign in at PLOS Article-Level Metrics and click on your account name. Your API key will be available in your user screen. This API key will be used for both the PLOS ALM API and PLOS Search API.