# Docs by LangChain: LangSmith REST API

> Markdown index of the LangSmith REST API documentation.

## LangSmith REST API

- [List hub environments](https://docs.langchain.com/langsmith/smith-api/hub_environments/list-hub-environments.md)
- [Create hub environments model](https://docs.langchain.com/langsmith/smith-api/hub_environments/create-hub-environments-model.md)
- [Delete hub environments model](https://docs.langchain.com/langsmith/smith-api/hub_environments/delete-hub-environments-model.md)
- [Update hub environments model](https://docs.langchain.com/langsmith/smith-api/hub_environments/update-hub-environments-model.md)