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  1. What is an API Key? Working and Types - GeeksforGeeks

    Jul 23, 2025 · We learned that an API key is a unique code that identifies an app or user to an API (just like a library card or club membership card) and that it’s crucial for security, tracking, and …

  2. What is an API key? - IBM

    What is an API key? An API key is a unique identifier used to authenticate software and systems attempting to access other software or systems via an application programming interface, or API.

  3. API key - Wikipedia

    An application programming interface (API) key is a secret unique identifier used to authenticate and authorize a user, developer, or calling program to an API. [1][2]

  4. What is an API key? - Postman Blog

    What is an API key? An API key is a unique string of randomly generated characters that is used to authenticate clients and grant access to an API. In this article, we’ll explain how to request …

  5. What is an API Key? Why Do We Need Them? Complete 2025 Guide

    Jul 16, 2025 · An API key is a unique identifier used to authenticate a user, developer, or calling program to an API. Essentially, it serves as a simple authentication mechanism that allows …

  6. What is an API Key: Meaning, Use Cases, and Best Practices

    Oct 22, 2025 · An API key is a code used to identify and authenticate an application or developer when making requests to an API. It acts as a gatekeeper, telling the API who is making the …

  7. What is an API Key? - API Keys and Tokens Explained - AWS

    What is API Key how and why businesses use API Key, and how to use API Key with AWS

  8. What Are API Keys? A Guide to Authentication and Security

    Nov 18, 2025 · What Is an API Key and How Does It Work? An API key is a unique identifier assigned to a client or application to authenticate with an API. It is typically a long string of …

  9. Understanding and using API Keys - w3resource

    Jan 9, 2025 · An API Key is a unique identifier used to authenticate requests associated with an application or project. It acts as a security token that enables developers to access an API …

  10. What Is an API Key? | API Key Definition | Fortinet

    Understand why API keys are used, how they provide security, and when not to use them. An application programming interface (API) key is a code used to identify and authenticate an …