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LangSmith supports SAML Single Sign-On (SSO) authentication for enterprise deployments. If your organization operates across multiple regions (US and EU), you'll need to configure SSO separately for each region due to unique authentication endpoints.
Region-Specific SSO URLs
Each LangSmith region has distinct SSO endpoints that must be used in your Identity Provider (IdP) configuration:
US Region
Entity ID:
https://auth.langchain.com/auth/v1/sso/saml/metadataACS URL:
https://auth.langchain.com/auth/v1/sso/saml/acsBase URL:
smith.langchain.com
EU Region
Entity ID:
https://eu.auth.langchain.com/auth/v1/sso/saml/metadataACS URL:
https://eu.auth.langchain.com/auth/v1/sso/saml/acsBase URL:
eu.smith.langchain.com
Multi-Region SSO Setup Requirements
When deploying LangSmith across multiple regions, keep these important requirements in mind:
Each region requires a separate SSO configuration with region-specific Entity IDs and ACS URLs
You cannot use the same Okta, Azure AD, or other IdP application for both US and EU regions
Organizations are separate entities between regions, requiring individual Enterprise plan setup for each region
Users must be provisioned separately in each regional organization
Configuration Process
Follow these steps to set up SSO for multi-region deployments:
Create Regional Organizations: Set up separate organization accounts in each desired region (US and/or EU)
Configure IdP Applications: Create separate IdP applications (Okta apps, Azure AD enterprise applications, etc.) for each region using the appropriate region-specific URLs listed above
Set Up SSO Per Region: Configure SSO separately for each regional organization using the corresponding IdP application
Access SSO Settings: In each regional organization, navigate to Settings > Members and Roles > SSO Configuration to find the region-specific SSO login URLs
Important Considerations
Users will need separate SSO login URLs for each region they need to access
Each region operates as an independent LangSmith deployment with its own user base and data
Enterprise plan features and billing are managed separately for each regional organization
If you need assistance with your specific IdP configuration or have questions about Enterprise plan setup for multiple regions, contact our support team for guidance.