# Docs by LangChain: LangSmith REST API

> Markdown index of the LangSmith REST API documentation.

## LangSmith REST API

- [Create playground settings](https://docs.langchain.com/langsmith/smith-api/playground-settings/create-playground-settings.md)
- [List playground settings](https://docs.langchain.com/langsmith/smith-api/playground-settings/list-playground-settings.md)
- [Get playground settings](https://docs.langchain.com/langsmith/smith-api/playground-settings/get-playground-settings.md)
- [Update playground settings](https://docs.langchain.com/langsmith/smith-api/playground-settings/update-playground-settings.md)
- [Delete playground settings](https://docs.langchain.com/langsmith/smith-api/playground-settings/delete-playground-settings.md)