API key authentication is a widely used method for securing APIs. It provides a simple way for clients to authenticate themselves when making requests to an API. This guide offers a comprehensive overview of API key authentication, including how to implement it, best practices, and common pitfalls to avoid.
What is API Key Authentication?
API key authentication involves the use of a unique identifier (the API key) that is passed with each request to authenticate the client. The server verifies the API key before granting access to protected resources. This method is straightforward and effective for many applications, particularly those with less stringent security requirements.
API key authentication is suitable for scenarios where:
- You need to control access to your API.
- The API will be accessed by client applications, such as web or mobile apps.
- The security needs are moderate, and you can manage API key exposure.
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