A guide to REST API authentication

The text discusses the importance and mechanics of REST API authentication, highlighting it as a critical security measure that verifies a user's or application's identity before granting access to resources. It differentiates between authentication, which identifies who you are, and authorization, which determines what actions you can perform. Various authentication methods are explored, including basic, API key, and token-based authentication, each with its own strengths and weaknesses. The text also examines real-life applications of these methods by companies like BambooHR, Greenhouse, and Box, and offers best practices for enhancing API security, such as strong password enforcement, token revocation, session length limitation, and access control lists. Additionally, it introduces Merge’s Unified API as a solution for integrating products with third-party applications, simplifying the authentication process and providing access to numerous integrations across software categories.

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