API key
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An application programing interface key (API key) is a code generated by websites that allow users to access their Application programming interface. API keys are used to track how the API is being used in order to prevent malicious use or abuse of the terms of service.
API keys are based on the UUID system to ensure they will be unique to each user. [1]
References
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- ^ Shopping.com. "What is an API Key and how do I get one?".