You will use API keys as credentials to authenticate against PTV Developer APIs. API usage will be metered for each key individually. Your subscription includes 1 API key.You will use API keys as credentials to authenticate against PTV Developer APIs. API usage will be metered for each key individually. Your subscription includes 1 API key.You will use API keys as credentials to authenticate against PTV Developer APIs. API usage will be metered for each key individually. Your subscription includes 1 API key.