# Best practices for Zoom Virtual Agent integrations

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Apply these guidelines to build reliable and secure integrations.

-   Use admin-managed Marketplace apps for enterprise deployments.
-   Define output variables for every Marketplace action.
-   Use the [Tools Template - Marketplace Action](/docs/virtual-agent/marketplace-integration/create-virtual-agent/#how-to-call-an-external-api-from-a-skill) to invoke external APIs.
-   Map variables correctly between skills and actions.
-   Use HTTPS endpoints for secure communication.
-   Test the integration in AI Studio before production deployment.