Create an account and API key
Create an account
To get started with LangSmith, you need to create an account. You can sign up for a free account here. We support logging in with Google, GitHub, Discord, and email.
API keys
LangSmith supports two types of API keys: Service Keys and Personal Access Tokens. Both types of tokens can be used to authenticate requests to the LangSmith API, but they have different use cases.
Read more about the differences between Service Keys and Personal Access Tokens under admin concepts
Create an API key
To log traces and run evaluations with LangSmith, you will need to create an API key to authenticate your requests. Currently, an API key is scoped to a workspace, so you will need to create an API key for each workspace you want to use.
To create either type of API key head to the Settings page, then scroll to the API Keys section. Then click Create API Key.
The API key will be shown only once, so make sure to copy it and store it in a safe place.
Configure the SDK
You may set the following environment variables in addition to LANGCHAIN_API_KEY (or equivalently LANGSMITH_API_KEY).
These are only required if using the EU instance.
LANGCHAIN_HUB_API_URL is only required if using the legacy langchainhub sdk
LANGCHAIN_ENDPOINT=https://api.smith.langchain.com
LANGCHAIN_HUB_API_URL=https://api.smith.langchain.com