What is an API Key?

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An API key is a unique code provided by an API provider that allows developers to access the API's services. Think of it as a password that grants you access to a particular API database or a service that the provider offers. It's used to authenticate and authorize requests, ensuring that only valid users can access the API.
Without an API key, you won’t be able to use most APIs, making it a critical step in the API development process. Whether you are developing an API application or integrating external API software into your project, understanding how to get an API key is fundamental.