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OpenMCP Client

v1.0.0•Developer Tools•stable

** - An all-in-one vscode/trae/cursor plugin for MCP server debugging. [Document](https://kirigaya.cn/openmcp/) & [OpenMCP SDK](https://kirigaya.cn/openmcp/sdk-tutorial/).

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What is OpenMCP Client?

OpenMCP Client is a Model Context Protocol (MCP) server that allows AI assistants like Claude, Cursor, and VS Code to ** - an all-in-one vscode/trae/cursor plugin for mcp server debugging. [document](https://kirigaya.cn/openmcp/) & [openmcp sdk](https://kirigaya.cn/openmcp/sdk-tutorial/).

** - An all-in-one vscode/trae/cursor plugin for MCP server debugging. [Document](https://kirigaya.cn/openmcp/) & [OpenMCP SDK](https://kirigaya.cn/openmcp/sdk-tutorial/).

This server falls under the Developer Tools category on MCPgee, the world's largest MCP server directory with 33,000+ servers.

Features

  • ** - An all-in-one vscode/trae/cursor plugin for MCP server

Use Cases

MCP server debugging in VS Code
Cursor and Trae plugin support
Protocol inspection and testing
LSTM-Kirigaya

Maintainer

LicenseApache-2.0
Languagetypescript
Versionv1.0.0
UpdatedMay 20, 2026
Statushealthy
Maintenanceactive

Works with

ClaudeOpenAIwindowsmacoslinux
View SourceBrowse All Servers

Installation

Manual Installation

npx openmcp-client

Configuration

Configuration Details

Config File

claude_desktop_config.json

Performance

Response Metrics

Response Time< 200ms
ThroughputMedium

Resource Usage

Memory UsageLow
CPU UsageLow

How to Set Up and Use OpenMCP Client

OpenMCP Client is an all-in-one development environment for building, debugging, and testing MCP (Model Context Protocol) servers inside VS Code, Cursor, and Trae. It provides an interactive panel to invoke tools, inspect prompts and resources, and validate server behavior before deploying — all without leaving your editor. Developers use it to iterate on MCP server implementations rapidly, with support for multiple LLM backends including DeepSeek, OpenAI, Qwen, Gemini, and Ollama.

Prerequisites

  • Node.js 18 or later installed
  • VS Code, Cursor, or Trae editor installed
  • npm or npx available on your PATH
  • An MCP server to debug (local or remote)
  • Optional: API key for a supported LLM provider (DeepSeek, OpenAI, etc.)
1

Install the OpenMCP CLI globally

Install the @agent-ruler/openmcp package globally to get the openmcp command available in your terminal.

npm install -g @agent-ruler/openmcp
2

Initialize a new project

Create a new OpenMCP project scaffold in a directory. This sets up the configuration files and folder structure needed to connect to and debug MCP servers.

openmcp init my-project
cd my-project
npm run setup
3

Start the development server

Launch the OpenMCP backend and frontend in development mode. The backend handles MCP protocol communication; the frontend renders the interactive debugging panel.

openmcp dev
4

Connect to your MCP server

From the OpenMCP panel in your editor, add your MCP server connection (stdio or HTTP transport). You can configure server launch commands or remote endpoints through the project management UI.

5

Test tools, prompts, and resources interactively

Use the interactive panel to call individual MCP tools with custom arguments, inspect prompt templates, and browse resources. Results are shown inline with full JSON detail.

6

Deploy using the SDK

Once your server is validated, use the openmcp-sdk to integrate it into your production agent or application.

npm install openmcp-sdk

OpenMCP Client Examples

Client configuration

Configure Claude Desktop to use openmcp-client as an MCP server for debugging purposes.

{
  "mcpServers": {
    "openmcp-client": {
      "command": "npx",
      "args": ["openmcp-client"]
    }
  }
}

Prompts to try

Example prompts for using OpenMCP Client to inspect and debug MCP servers.

- "List all available tools from my connected MCP server"
- "Call the 'search' tool with query parameter 'machine learning'"
- "Show me all resources exposed by the weather MCP server"
- "Test the 'get_news' prompt template with topic set to 'technology'"
- "Check whether my MCP server handles invalid arguments gracefully"

Troubleshooting OpenMCP Client

openmcp command not found after global install

Run 'npm install -g @agent-ruler/openmcp' and ensure your npm global bin directory is in your PATH. Check with 'npm bin -g' and add it to your shell profile if missing.

Cannot connect to MCP server in the debug panel

Verify the server launch command and working directory are correct in your project config. For stdio servers, ensure the server binary is executable. For HTTP servers, confirm the port is not blocked by a firewall.

Frontend panel does not load in VS Code

Try running 'openmcp dev --service-only' to start just the backend, then restart VS Code. If the issue persists, run 'openmcp update' to pull the latest version and clear any cached extension state.

Frequently Asked Questions about OpenMCP Client

What is OpenMCP Client?

OpenMCP Client is a Model Context Protocol (MCP) server that ** - an all-in-one vscode/trae/cursor plugin for mcp server debugging. [document](https://kirigaya.cn/openmcp/) & [openmcp sdk](https://kirigaya.cn/openmcp/sdk-tutorial/). It connects AI assistants to external tools and data sources through a standardized interface.

How do I install OpenMCP Client?

Follow the installation instructions on the OpenMCP Client GitHub repository. Clone the repo, install dependencies, and add the server config to your AI client.

Which AI clients work with OpenMCP Client?

OpenMCP Client works with all major MCP-compatible AI clients including Claude Desktop, Claude Code, Cursor, VS Code (GitHub Copilot), Windsurf, and Cline.

Is OpenMCP Client free to use?

Yes, OpenMCP Client is open source and available under the Apache-2.0 license. You can use it freely in both personal and commercial projects.

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Quick Config Preview

{ "mcpServers": { "openmcp-client": { "command": "npx", "args": ["-y", "openmcp-client"] } } }

Add this to your claude_desktop_config.json or .cursor/mcp.json

Read the full setup guide →

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