> For the complete documentation index, see [llms.txt](https://docshome.gitbook.io/microservices/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docshome.gitbook.io/microservices/3-inter-process-communication/3.3-ding-yi-api.md).

# 3.3、定义 API