# mcprouter

> Governed MCP tool discovery and execution for Node.js applications.

- [mcprouter](https://docs.mcprouter.dev/index.md): Discover, rank, and call MCP tools with explicit host-owned policy.
- [Install a development candidate](https://docs.mcprouter.dev/start/install.md): Obtain an unpublished, verified archive without assuming a public npm release.
- [Make a first governed call](https://docs.mcprouter.dev/start/first-call.md): Register and call a synthetic local tool without models or external services.
- [Choose an integration path](https://docs.mcprouter.dev/start/choose-integration.md): Compare exact calls, tool filtering, bounded intent execution, and AI SDK hosting.
- [Models, MCP servers, and policy](https://docs.mcprouter.dev/integrate/models-servers-policies.md): Set up trusted connections and host-owned authorization before filtering or execution.
- [Assign models to servers and tools](https://docs.mcprouter.dev/integrate/model-bindings.md): Resolve routing preferences separately from eligibility, model access, and permission.
- [Filter tools](https://docs.mcprouter.dev/integrate/filter.md): Find relevant MCP tools without dispatching a tool or granting permission.
- [Execute one intent](https://docs.mcprouter.dev/integrate/execute.md): Scope eligible tools before model proposal, validation and governed dispatch.
- [Governed tools for the AI SDK](https://docs.mcprouter.dev/integrate/ai-sdk.md): Let the host choose inference while mcprouter governs each tool execution.
- [Security and trust boundaries](https://docs.mcprouter.dev/guides/security-and-trust.md): Assign authority to the host, not model proposals, MCP metadata or retrieval scores.
- [Router API](https://docs.mcprouter.dev/reference/router.md): The public router lifecycle and the boundary between selecting tools and calling them.
- [Outcomes and errors](https://docs.mcprouter.dev/reference/results-and-errors.md): Interpret returned execution statuses, typed errors and uncertain side effects.


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