什么是 API ？
API 是 Application Programming Interface（应用程序编程接口）的缩写。是一些预先定义的函数，用于实现应用程序与应用程序/应用程序与服务间的交互。Application 一词指任何软件或计算机程序，而 Interface 指这两种不同的应用程序之间的联系。这种连接（或接口）是使用 Request（请求）和 Response（响应）的组合在各种应用程序之间进行通信。
API 用于何处？
In simple words, an API is a set of functions and procedures that is used to transport data from one application to another. This data is usually the 'end product' of the other app or service's existing feature. Thus, using an API saves developers a substantial amount of time and hassle since they now don't have to write the code for pre-existing features from scratch, and can instead request the feature from another application or system through an existing API.
有什么 API 示例？
一个常见的 API 示例，通过第三方网站（比如 Skyscanner 或 Kayak. After filling out your preferences for dates, departure and arrival cities,etc the third party website has to interact with the airline's website to check flights that match your preferences. This interaction is done through an interaction with the airlines API.
Tenjin 提供哪些 API ？
客户最常用的两个 API 就是 Reporting Metrics（数据报告）API 以及 Campaign Management（广告管理）API are some of the most widely used API examples for Tenjin customers. Most software-as-a-service (SaaS) companies provide APIs that developers can use to write code which posts data and gets data from the provider's endpoint.
为什么要使用 API ？
API 最常用于帮助开发人员将新的应用程序轻松集成到现有的数据库体系结构中，这反过来又有助于业务和 IT 团队更高效地合作。有效地使用 API 可以帮助企业应对高速变化的数字市场。