LangSmith’s API supports programmatic access via API key to all of the actions available in the UI, with only a few exceptions that are noted in User-only endpoints.
Before diving into this content, it might be helpful to read the following:
There are a few limitations that will be lifted soon:
  • The LangSmith SDKs do not support these organization management actions yet.
  • Service Keys don’t have access to newly-added workspaces yet (we’re adding support soon). We recommend using a PAT of an Organization Admin for now, which by default has the required permissions for these actions.
Some commonly-used endpoints and use cases are listed below. For a complete list of available endpoints, see the API docs. The X-Organization-Id header should be present on all requests, and X-Tenant-Id header should be present on requests that are scoped to a particular workspace.

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Workspaces

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User management

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RBAC

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Membership management

List roles under RBAC should be used for retrieving role IDs of these operations. List [organization|workspace] members endpoints (below) response "id"s should be used as identity_id in these operations. Organization level: Workspace level:
These params should be omitted: read_only (deprecated), password and full_name (basic auth only)

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API keys

Use the X-Tenant-Id header to specify which workspace to target. If the header is not present, operations will default to the workspace the API key was initially created in.

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Security settings

“Shared resources” in this context refer to public prompts, shared runs, and shared datasets.

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User-only endpoints

These endpoints are user-scoped and require a logged-in user’s JWT, so they should only be executed through the UI.
  • /api-key/current endpoints: these are related a user’s PATs
  • /sso/email-verification/send (Cloud-only): this endpoint is related to SAML SSO

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Sample code

The sample code below goes through a few common workflows related to organization management. Make sure to make necessary replacements wherever <replace_me> is in the code. 
import os
import requests

def main():
    api_key = os.environ["LANGSMITH_API_KEY"]
    # LANGSMITH_ORGANIZATION_ID is not a standard environment variable in the SDK, just used for this example
    organization_id = os.environ["LANGSMITH_ORGANIZATION_ID"]
    base_url = os.environ.get("LANGSMITH_ENDPOINT")  # or "https://api.smith.langchain.com". Update appropriately for self-hosted installations or the EU region
    headers = {
        "Content-Type": "application/json",
        "X-API-Key": api_key,
        "X-Organization-Id": organization_id,
    }
    session = requests.Session()
    session.headers.update(headers)
    workspaces_path = f"{base_url}/api/v1/workspaces"
    orgs_path = f"{base_url}/api/v1/orgs/current"
    api_keys_path = f"{base_url}/api/v1/api-key"

    # Create a workspace
    workspace_res = session.post(workspaces_path, json={"display_name": "My Workspace"})
    workspace_res.raise_for_status()
    workspace = workspace_res.json()
    workspace_id = workspace["id"]
    new_workspace_headers = {
        "X-Tenant-Id": workspace_id,
    }

    # Grab roles - this includes both organization and workspace roles
    roles_res = session.get(f"{orgs_path}/roles")
    roles_res.raise_for_status()
    roles = roles_res.json()
    # system org roles are 'Organization Admin', 'Organization User'
    # system workspace roles are 'Admin', 'Editor', 'Viewer'
    org_roles_by_name = {role["display_name"]: role for role in roles if role["access_scope"] == "organization"}
    ws_roles_by_name = {role["display_name"]: role for role in roles if role["access_scope"] == "workspace"}

    # Invite a user to the org and the new workspace, as an Editor.
    # workspace_role_id is only allowed if RBAC is enabled (an enterprise feature).
    new_user_email = "<replace_me>"
    new_user_res = session.post(
        f"{orgs_path}/members",
        json={
            "email": new_user_email,
            "role_id": org_roles_by_name["Organization User"]["id"],
            "workspace_ids": [workspace_id],
            "workspace_role_id": ws_roles_by_name["Editor"]["id"],
        },
    )
    new_user_res.raise_for_status()

    # Add a user that already exists in the org to the new workspace, as a Viewer.
    # workspace_role_id is only allowed if RBAC is enabled (an enterprise feature).
    existing_user_email = "<replace_me>"
    org_members_res = session.get(f"{orgs_path}/members")
    org_members_res.raise_for_status()
    org_members = org_members_res.json()
    existing_org_member = next(
        (member for member in org_members["members"] if member["email"] == existing_user_email), None
    )
    existing_user_res = session.post(
        f"{workspaces_path}/current/members",
        json={
            "user_id": existing_org_member["user_id"],
            "workspace_ids": [workspace_id],
            "workspace_role_id": ws_roles_by_name["Viewer"]["id"],
        },
        headers=new_workspace_headers,
    )
    existing_user_res.raise_for_status()

    # List all members of the workspace
    members_res = session.get(f"{workspaces_path}/current/members", headers=new_workspace_headers)
    members_res.raise_for_status()
    members = members_res.json()
    workspace_member = next(
        (member for member in members["members"] if member["email"] == existing_user_email), None
    )

    # Update the user's workspace role to Admin (enterprise-only)
    existing_user_id = workspace_member["id"]
    update_res = session.patch(
        f"{workspaces_path}/current/members/{existing_user_id}",
        json={"role_id": ws_roles_by_name["Admin"]["id"]},
        headers=new_workspace_headers,
    )
    update_res.raise_for_status()

    # Update the user's organization role to Organization Admin
    update_res = session.patch(
        f"{orgs_path}/members/{existing_org_member['id']}",
        json={"role_id": org_roles_by_name["Organization Admin"]["id"]},
    )
    update_res.raise_for_status()

    # Create a new Service key
    api_key_res = session.post(
        api_keys_path,
        json={"description": "my key"},
        headers=new_workspace_headers,
    )
    api_key_res.raise_for_status()
    api_key_json = api_key_res.json()
    api_key = api_key_json["key"]

if __name__ == "__main__":
    main()