---
title: Custom MCP Tool
pageTitle: Custom MCP Tool
eyebrow: Fusion
lead: Connect local or remote MCP tools to a Fusion model.
---

## Entry Point

Click **Add custom MCP** and select a transport.

## Transports

- **stdio**: local command-line tools.
- **streamable-http / sse**: remote MCP services.
- **Discover tools**: read tools exposed by the MCP server.

## Verification

Validate risky or slow tools in a dedicated Agent Config before using them in production routing.
