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Quick Start

Start MCPJam Inspector with a single command: 
npx @mcpjam/inspector@latest
After installation completes, you’ll see a link to localhost. Open that link in your browser to access the inspector.
Don’t have Node.js installed? Download our desktop app for Mac or Windows.

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Connect Your First MCP Server

Click “Add server” and connect to an MCP server. For this example, we’ll use Anthropic’s sample server: 
npx -y @modelcontextprotocol/server-everything
Server everything demo
Once you submit, the connection status should show “Connected”. You can connect to multiple MCP servers simultaneously on MCPJam.

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Test an MCP Tool

Navigate to the “Tools” tab to see all available tools from server-everything. This tab lets you manually test individual tools with custom parameters. Try the add tool:
  1. Select the add tool from the list
  2. Set parameters for a and b
  3. Click “Execute”
  4. View the tool’s return value at the bottom
Add tool demo

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Explore More Features

Now that you’ve connected a server and tested a tool, explore the full power of MCPJam Inspector:

App Builder

Build and test ChatGPT apps and MCP apps with a full widget emulator

LLM Playground

Chat with your MCP server using frontier models like GPT-5 and Claude Sonnet

OAuth Debugger

Debug your OAuth implementation with step-by-step guidance

MCP Inspector

Manually test tools, resources, and prompts with full JSON-RPC logging