SAML SSO

Single Sign-On (SSO) functionality is available for Enterprise Cloud customers to access LangSmith through a single authentication source. This allows administrators to centrally manage team access and keeps information more secure.

LangSmith's SSO configuration is built using the SAML (Security Assertion Markup Language) 2.0 standard. SAML 2.0 enables connecting an Identity Provider (IdP) to your organization for an easier, more secure login experience.

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SAML SSO is available for organizations on the Enterprise plan. Please contact sales to learn more.

What is SAML SSO?

SSO services permit a user to use one set of credentials (for example, a name or email address and password) to access multiple applications. The service authenticates the end user only once for all the applications the user has been given rights to and eliminates further prompts when the user switches applications during the same session.

Benefits of SSO

• Streamlines user management across systems for organization owners.
• Enables organizations to enforce their own security policies (e.g. MFA)
• Removes the need for end-users to remember and manage multiple passwords. Simplifies end-users experience by allowing them to sign in at one single access point and enjoy a seamless experience across multiple applications.

Set up SAML SSO for your organization

Prerequisites

• Your organization must be on an Enterprise plan
• Your Identity Provider (IdP) must support the SAML 2.0 standard
• Only Organization Admins can configure SAML SSO

Initial configuration

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See IdP-specific instructions below

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The URLs are different for the US and EU. Please make sure to select your region from the dropdown in the top right.

1. In your IdP: Configure a SAML application with the following details, then copy the metadata URL or XML for step 3 below
   1. Single sign-on URL a.k.a. ACS URL: https://auth.langchain.com/auth/v1/sso/saml/acs
   2. Audience URI a.k.a. SP Entity ID: https://auth.langchain.com/auth/v1/sso/saml/metadata
   3. Name ID format: email address
   4. Application username: email address
   5. Required claims: sub and email
2. In LangSmith: Go to Settings -> Members and roles -> SSO Configuration
   1. Fill in the required information and submit to activate SSO login
      1. Fill in either the SAML metadata URL or SAML metadata XML
      2. Select the Default workspace role and Default workspaces. New users logging in via SSO will be added to the specified workspaces with the selected role.

Editing SAML SSO settings

• Default workspace role and Default workspaces are editable. The updated settings will apply to new users only, not existing users.
• (Coming soon) SAML metadata URL and SAML metadata XML are editable. This is usually only necessary when cryptographic keys are rotated/expired or the metadata URL has changed but the same IdP is still used.

Just-in-time (JIT) provisioning

LangSmith supports Just-in-Time provisioning when using SAML SSO. This allows someone signing in via SAML SSO to join the organization and selected workspaces automatically as a member.

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JIT provisioning only runs for new users i.e. users who do not already have access to the organization with the same email address via a different login method

Login methods and access

Once you have completed your configuration of SAML SSO for your organization, users will be able to login via SAML SSO in addition to other login methods such as username/password and Google Authentication.

• When logged in via SAML SSO, users can only access the corresponding organization with SAML SSO configured.
• Users with SAML SSO as their only login method do not have personal organizations
• When logged in via any other method, users can access the organization with SAML SSO configured along with any other organizations they are a part of

Enforce SAML SSO only

To ensure users can only access the organization when logged in using SAML SSO and no other method, check the Login via SSO only checkbox and click Save. Once this happens, users accessing the organization that are logged-in via a non-SSO login method are required to log back in using SAML SSO.
This setting can be switched back to allow all login methods by unselecting the checkbox and clicking Save.

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You must be logged in via SAML SSO in order to update this setting to Only SAML SSO. This is to ensure the SAML settings are valid and avoid locking users out of your organization.

Support and troubleshooting

If you have issues setting up SAML SSO, please reach out to support@langchain.dev.

FAQ

How do I change a SAML SSO user's email address?

Some identity providers retain the original User ID through an email change while others do not, so we recommend that you follow these steps to avoid duplicate users in LangSmith:

1. Remove the user from the organization (see here)
2. Change their email address in the IdP
3. Have them login to LangSmith again via SAML SSO - this will trigger the usual JIT provisioning flow with their new email address

How do I fix "405 method not allowed"?

Ensure you're using the correct ACS URL: https://auth.langchain.com/auth/v1/sso/saml/acs

Identity Provider (IdP) Setup

These are instructions for setting up LangSmith SAML SSO with Entra ID (formerly Azure), Google, and Okta. If you use a different Identity Provider and need assistance with configuration, please contact our support team.

Entra ID (Azure)

For additional information, see Microsoft's documentation.

Step 1: Create a new Entra ID application integration

1. Log in to the Azure portal with a privileged role (e.g. Global Administrator). On the left navigation pane, select the Entra ID service.
2. Navigate to Enterprise Applications and then select All Applications.
3. Click Create your own application.
4. In the Create your own application window:
   1. Enter a name for your application (e.g. LangSmith)
   2. Select Integrate any other application you don't find in the gallery (Non-gallery).
5. Click Create.

Step 2: Configure the Entra ID application and obtain the SAML Metadata

1. Open the enterprise application that you created.
2. In the left-side navigation, select Manage > Single sign-on.
3. On the Single sign-on page, click SAML.
4. Update the Basic SAML Configuration
   1. Identifier (Entity ID): https://auth.langchain.com/auth/v1/sso/saml/metadata
   2. Reply URL (Assertion Consumer Service URL): https://auth.langchain.com/auth/v1/sso/saml/acs
   3. Leave Relay State, Logout Url, and Sign on URL empty
   4. Click Save
5. Ensure required claims are present with Namespace: http://schemas.xmlsoap.org/ws/2005/05/identity/claims
   1. sub: user.objectid
   2. emailaddress: user.userprincipalname or user.mail (if using the latter, ensure all users have the Email field filled in under Contact Information)
6. On the SAML-based Sign-on page, under SAML Certificates, copy the App Federation Metadata Url.

Step 3: Set up LangSmith SSO Configuration

Follow the instructions under initial configuration in the Fill in required information step, using the metadata URL from the previous step.

Step 4: Verify the SSO setup

1. Assign the application to users/groups in Entra ID
   1. Select Manage > Users and groups
   2. Click Add user/group
   3. In the Add Assignment window:
      1. Under Users, click None Selected.
      2. Search for the user you want to assign to the enterprise application, and then click Select.
      3. Verify that the user is selected, and click Assign.
2. Have the user sign in via the unique login URL from the SSO Configuration page, or go to Manage > Single sign-on and select Test single sign-on with <application name>

Google

For additional information, see Google's documentation.

Step 1: Create and configure the Google Workspace SAML application

1. Make sure you're signed into an administrator account with the appropriate permissions.
2. In the Admin console, go to Menu -> Apps -> Web and mobile apps.
3. Click Add App and then Add custom SAML app.
4. Enter the app name and, optionally, upload an icon. Click Continue.
5. On the Google Identity Provider details page, download the IDP metadata and save it for Step 2 below. Click Continue.
6. In the Service Provider Details window, enter:
   1. ACS URL: https://auth.langchain.com/auth/v1/sso/saml/acs
   2. Entity ID: https://auth.langchain.com/auth/v1/sso/saml/metadata
   3. Leave Start URL and the Signed response box empty.
   4. Set Name ID format to EMAIL and leave Name ID as the default (Basic Information > Primary email).
   5. Click Continue.
7. Use Add mapping to ensure required claims are present:
   1. Basic Information > Primary email -> email

Step 2: Set up LangSmith SSO Configuration

Follow the instructions under initial configuration in the Fill in required information step, using the IDP metadata from the previous step as the metadata XML.

Step 3: Turn on the SAML app in Google

1. Select the SAML app under Menu -> Apps -> Web and mobile apps
2. Click User access.
3. Turn on the service:
   1. To turn the service on for everyone in your organization, click On for everyone, and then click Save.
   2. To turn the service on for an organizational unit:
      1. At the left, select the organizational unit then On.
      2. If the Service status is set to Inherited and you want to keep the updated setting, even if the parent setting changes, click Override.
      3. If the Service status is set to Overridden, either click Inherit to revert to the same setting as its parent, or click Save to keep the new setting, even if the parent setting changes.
   3. To turn on a service for a set of users across or within organizational units, select an access group. For details, go to Use groups to customize service access.
4. Ensure that the email addresses your users use to sign in to LangSmith match the email addresses they use to sign in to your Google domain.

Step 4: Verify the SSO setup

Have a user with access sign in via the unique login URL from the SSO Configuration page, or go to the SAML application page in Google and click TEST SAML LOGIN.

Okta

For additional information, see Okta's documentation.

Step 1: Create and configure the Okta SAML application

1. Log in to Okta as an administrator, and go to the Okta Admin console.
2. Under Applications > Applications click Create App Integration
3. Select SAML 2.0
4. Enter an App name (e.g. LangSmith) and optionally an App logo, then click Next
5. Enter the following information in the Configure SAML page:
   1. Single sign-on URL a.k.a. ACS URL: https://auth.langchain.com/auth/v1/sso/saml/acs. Keep Use this for Recipient URL and Destination URL checked.
   2. Audience URI (SP Entity ID): https://auth.langchain.com/auth/v1/sso/saml/metadata
   3. Name ID format: EmailAddress
   4. Application username: email
   5. Leave the rest of the fields empty or set to their default.
   6. Click `Next
6. Click Finish
7. Copy the Metadata URL from the Sign On page to use in the next step

Step 2: Set up LangSmith SSO Configuration

Follow the instructions under initial configuration in the Fill in required information step, using the metadata URL from the previous step.

Step 3: Assign users to LangSmith in Okta

1. Under Applications > Applications, select the SAML application created in Step 1
2. Under the Assignments tab, click Assign then either Assign to People or Assign to Groups
3. Make the desired selection(s), then Assign and Done

Step 4: Verify the SSO setup

Have a user with access sign in via the unique login URL from the SSO Configuration page, or have a user select the application from their Okta dashboard.