How to use your self-hosted instance of LangSmith

This guide will walk you through the process of using your self-hosted instance of LangSmith.

Self-Hosted LangSmith Instance Required

This guide assumes you have already deployed a self-hosted LangSmith instance. If you have not, please refer to the kubernetes deployment guide or the docker deployment guide.

Using your deployment:

1. Once you have deployed your instance, you can access the LangSmith UI at http://<external ip>.
2. The backend API will be available at http://<external ip>/api and the hub API will be available at http://<external ip>/api-hub.

To use the LangSmith API, you will need to set the following environment variables in your application:

LANGCHAIN_ENDPOINT=http://<external ip>/api
LANGCHAIN_HUB_API_URL=http://<external ip>/api-hub
LANGCHAIN_API_KEY=foo # Set to a legitimate API key if using OAuth

You can also configure these variables directly in the LangSmith SDK client:

import langsmith

langsmith_client = langsmith.Client(
    api_key='<api_key>',
    api_url='http://<external ip>/api',
)

import langchainhub

langchainhub.Client(
    api_key='<api_key>',
    api_url='http://<external ip>/api-hub'
)

After setting the above, you should be able to run your code and see the results in your self-hosted instance. We recommend running through the quickstart guide to get a feel for how to use LangSmith.