### Answer
Based on the available documentation, I don't have specific information about how to add library-level components to an agent using the API. The documentation shows how to list conversation flow components via the API [(1) ](
) , but doesn't detail the endpoint for adding existing library components to a specific agent's flow.
The documentation explains that library components are account-level and reusable across multiple agents [(2) ](
) , and you can add them through the UI by clicking a Component from the Components tab . However, the API reference provided doesn't include the specific endpoint or method for programmatically adding these library components to an agent.
I'd recommend checking out these potentially useful sources:
- [List Conversation Flow Components](
)
- [Components](
)
You might also want to visit the [Documentation](
) or contact a [certified Retell partner](
) for guidance on the specific API endpoint for this operation.
Would you like me to try to provide a general answer based on common API patterns, or would you prefer to explore the documentation further?