# Docs by LangChain: LangSmith REST API

> Markdown index of the LangSmith REST API documentation.

## LangSmith REST API

- [List feature configurations](https://docs.langchain.com/langsmith/smith-api/features/list-feature-configurations.md)
- [Set default model for a feature](https://docs.langchain.com/langsmith/smith-api/features/set-default-model-for-a-feature.md)
- [Delete default model for a feature](https://docs.langchain.com/langsmith/smith-api/features/delete-default-model-for-a-feature.md)
- [Disable a model for a feature](https://docs.langchain.com/langsmith/smith-api/features/disable-a-model-for-a-feature.md)
- [Re-enable a disabled model for a feature](https://docs.langchain.com/langsmith/smith-api/features/re-enable-a-disabled-model-for-a-feature.md)