> ## Documentation Index > Fetch the complete documentation index at: https://docs.beyondguard.ai/llms.txt > Use this file to discover all available pages before exploring further. # Model Library: Central Model Inventory > A single registry of every AI model in use — local or cloud — with masked credentials and Fetch Models, feeding Guard, Sandbox, and Secondary Model Routing from one reliable source. The **Model Library** is a central inventory of every AI model available to your organization. It is the single, reliable source of the model connection information other modules — Guard, Sandbox, Agent Builder, and Secondary Model Routing — depend on. ## Registering models Add a model with the **Add Model** action, defining: * **Name** — a display name. * **Provider** — for example `local` or `openai`. * **Model identifier** — the provider's model ID. * **Base URL** — the endpoint the model is accessed through. The list combines **local / self-hosted** models and **cloud** models (such as OpenAI) under one view, giving full visibility into which models are registered, by which organization, and when. ## Credentials and Fetch Models On a model's edit screen, the authentication credentials needed to connect (**Header Key** / **Header Value**) are stored securely and **displayed masked by default**. The **Fetch Models** feature queries the provider using the entered connection details and returns the models currently available, so you can select and update from the live list. Because model connections live in one place, updating a model's details once propagates automatically to every module that uses it — there's no need to maintain separate integrations per module. ## The foundation for other modules The Model Library is the reference data layer the rest of the platform builds on: Pulls models from the registry to security-scan them. Uses the primary–secondary mapping defined here. Points endpoints at registered models. Tests registered models against attack scenarios. This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.