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mcp_use_inspector

The mcp-use server framework includes a built-in Inspector UI, a web-based interface for real-time monitoring, debugging, and interaction with your MCP server. It provides a quick way to see server status, available tools, resources, and logs.

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What is the Inspector UI?

The Inspector UI is a built-in web interface that provides real-time monitoring and debugging capabilities for your MCP server. It’s a visual dashboard that shows server status, available tools, resources, and logs. It also includes a BYOK (Bring Your Own Key) chat interface for interactive communication with your MCP server.

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Why Use the Inspector UI?

The Inspector UI makes it easier to:
  • Debug issues by seeing real-time logs and server status
  • Test tools interactively without writing client code
  • Monitor performance with live metrics and request tracking
  • Explore capabilities by browsing available tools and resources
  • Chat with your server using the built-in BYOK chat interface
The Inspector UI is only available when the server is running in debug mode. It is automatically disabled in production for security reasons.

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Accessing the Inspector

Once your mcp-use server is running in debug mode, you can access the Inspector UI in your browser. By default, the Inspector lives at /inspector. For a server running on http://localhost:3001, the default Inspector URL is: http://localhost:3001/inspector

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inspector_path semantics

inspector_path is a base prefix, not a replacement for /inspector.
  • inspector_path="/" or omitting it keeps the default route at /inspector
  • inspector_path="/mcp" mounts the Inspector at /mcp/inspector
  • inspector_path="/internal/debug" mounts the Inspector at /internal/debug/inspector
  • inspector_path="/mcp/inspector" is still accepted for backward compatibility and normalizes to the same final route
This is independent from mcp_path:
  • mcp_path="/mcp" and default inspector_path gives you /mcp for MCP traffic and /inspector for the Inspector
  • mcp_path="/mcp" and inspector_path="/mcp" gives you /mcp for MCP traffic and /mcp/inspector for the Inspector
from mcp_use.server import MCPServer

server = MCPServer(
    name="my-server",
    debug=True,
    mcp_path="/mcp",
    inspector_path="/mcp",
)

# MCP endpoint:       /mcp
# Inspector endpoint: /mcp/inspector

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Demo

Description of the GIF

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Configuration

The Inspector UI is automatically enabled when running in debug mode and disabled in production. 
from mcp_use.server import MCPServer

server = MCPServer(
    name="my-server",
    debug=True,
    inspector_path="/internal",
)

# Inspector endpoint: /internal/inspector

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Next Steps