# Docs by LangChain: LangSmith REST API

> Markdown index of the LangSmith REST API documentation.

## LangSmith REST API

- [List access policies](https://docs.langchain.com/langsmith/smith-api/access_policies/list-access-policies.md)
- [Create an access policy](https://docs.langchain.com/langsmith/smith-api/access_policies/create-an-access-policy.md)
- [Attach access policies to a role](https://docs.langchain.com/langsmith/smith-api/access_policies/attach-access-policies-to-a-role.md)
- [Get an access policy](https://docs.langchain.com/langsmith/smith-api/access_policies/get-an-access-policy.md)
- [Delete an access policy](https://docs.langchain.com/langsmith/smith-api/access_policies/delete-an-access-policy.md)
- [Update an access policy](https://docs.langchain.com/langsmith/smith-api/access_policies/update-an-access-policy.md)
- [Attach access policies to a role](https://docs.langchain.com/langsmith/smith-api/access_policies/attach-access-policies-to-a-role-1.md)
- [Detach access policies from a role](https://docs.langchain.com/langsmith/smith-api/access_policies/detach-access-policies-from-a-role.md)