> For the complete documentation index, see [llms.txt](https://justin-se.gitbook.io/justin-se-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://justin-se.gitbook.io/justin-se-docs/basic-knowledge/open-api.md).

# Open API

* sites
  * Open API ( Protocol ) - <https://www.openapis.org/>
  * swagger UI ( Dev Tool )  - <https://swagger.io/tools/swagger-ui/>