# 应用开发指南及协议API 平台API包含两个主要部分：设备接入协议API和服务器端Rest API。 设备API按支持的通信协议：MQTT API，CoAP API，HTTP API **MQTT端口：**47.106.143.1:1883 **HTTP端口：** **COAP端口：**47.106.143.1:5663 #### --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://doc.yuncitys.com/xie-yi-jie-kou.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.