OpenMCP Client

OpenMCP

An all-in-one vscode/trae/cursor plugin for MCP server debugging.

👆 Full Video

openmcpent

Integrated Inspector + MCP client basic functions, combining development and testing into one.

Test mcp tools, prompts and resources with a variety of tools.

Tested tools can be placed in the "Interactive Testing" module for large model interaction testing.

Complete project-level management panel for easier MCP project management at both project and global levels.

Supports multiple large models: DeepSeek, OpenAI, Qwen, Gemini, Grok, Mistral, MiniMax, Groq, Perplexity, Kimi, Ollama, OpenRouter and more.

Support XML mode and customized options for your tool selection.

openmcp-sdk

once everything is tested and verified in openmcpent, you can deploy your mcp as an agent app with openmcp-sdk fastly and easily:

npm install openmcp-sdk

then deploy your agent with just lines of codes

import { OmAgent } from 'openmcp-sdk/service/sdk';

// create Agent
const agent = new OmAgent();
    
// Load configuration, which can be automatically generated after debugging with openmcp client
agent.loadMcpConfig('./mcpconfig.json');

// Read the debugged prompt
const prompt = await agent.getPrompt('hacknews', { topn: '5' });    

// Execute the task
const res = await agent.ainvoke({ messages: prompt });

console.log('⚙️ Agent Response', res);

output

[2025/6/20 20:47:31] 🚀 [crawl4ai-mcp] 1.9.1 connected
[2025/6/20 20:47:35] 🤖 Agent wants to use these tools get_web_markdown
[2025/6/20 20:47:35] 🔧 using tool get_web_markdown
[2025/6/20 20:47:39] ✓  use tools success
[2025/6/20 20:47:46] 🤖 Agent wants to use these tools get_web_markdown, get_web_markdown, get_web_markdown
[2025/6/20 20:47:46] 🔧 using tool get_web_markdown
[2025/6/20 20:47:48] ✓  use tools success
[2025/6/20 20:47:48] 🔧 using tool get_web_markdown
[2025/6/20 20:47:54] ✓  use tools success
[2025/6/20 20:47:54] 🔧 using tool get_web_markdown
[2025/6/20 20:47:57] ✓  use tools success

⚙️ Agent Response
⌨️ Today's Tech Article Roundup

📌 How to Detect or Observe Passing Gravitational Waves?
Summary: This article explores the physics of gravitational waves, explaining their effects on space-time and how humans might perceive or observe this cosmic phenomenon.
Author: ynoxinul
Posted: 2 hours ago
Link: https://physics.stackexchange.com/questions/338912/how-would-a-passing-gravitational-wave-look-or-feel

📌 Learn Makefile Tutorial
Summary: A comprehensive Makefile tutorial for beginners and advanced users, covering basic syntax, variables, automatic rules, and advanced features to help developers manage project builds efficiently.
Author: dsego
Posted: 4 hours ago
Link: https://makefiletutorial.com/

📌 Hurl: Run and Test HTTP Requests in Plain Text
Summary: Hurl is a command-line tool that allows defining and executing HTTP requests in plain text format, ideal for data fetching and HTTP session testing. It supports chained requests, value capture, and response queries, making it perfect for testing REST, SOAP, and GraphQL APIs.
Author: flykespice
Posted: 8 hours ago
Link: https://github.com/Orange-OpenSource/hurl

🔗 Document of openmcp-sdk

Want to become a contributor ?

Click here to learn how to make contribution to OpenMCP.

Join Our Community

• Email: zhelonghuang@qq.com
• QQ: 782833642
• Wechat: contact lstmkirigaya
• Discord: https://discord.gg/SKTZRf6NzU

TODO

Feature Roadmap

Module	Feature	Priority	Status	Fix Priority
all	Complete basic infrastructure	Full Version	100%	Done
render	Support cost analysis in chat mode	Iteration	100%	Done
ext	Support basic MCP project management	Iteration	100%	P0
service	Support custom OpenAI-compatible large model integration	Full Version	100%	Done
service	Support custom protocol large model integration	MVP	0%	P1
all	Support debugging multiple MCP Servers simultaneously	MVP	100%	P0
all	Support online verification via large models	Iteration	100%	Done
all	Support saving user's server debugging work	Iteration	100%	Done
render	High-risk operation permission confirmation	MVP	0%	P1
service	Hot update for connected MCP servers	MVP	0%	P1
service	Cloud sync for system configuration	MVP	0%	P1
all	System prompt management module	Iteration	100%	Done
service	Tool-wise logging system	MVP	0%	P1
service	MCP security checks (prevent prompt injection, etc.)	MVP	0%	P1
service	Built-in OCR for character recognition	Iteration	100%	Done

Project Concept

OpenMCP adopts a layered modular design. By assembling different modules, it can be implemented in different modes on different platforms.

flowchart TD
    subgraph OpenMCP Core Components
        renderer[Renderer]
        openmcpservice[OpenMCPService]
    end

    subgraph OpenMCP_Web["OpenMCP Web"]
        renderer
        openmcpservice
        nginx[Nginx]
    end

    subgraph OpenMCP_Plugin["OpenMCP Plugin"]
        renderer
        openmcpservice
        vscode[VSCode Plugin Code]
    end

    subgraph OpenMCP_App["OpenMCP App"]
        renderer
        openmcpservice
        electron[Electron Code]
    end

    subgraph QQBot["OpenMCP-based QQ Bot"]
        lagrange[Lagrange.OneBot]
        openmcpservice
    end

    %% Dependencies
    OpenMCP_Web -->|Frontend Rendering| renderer
    OpenMCP_Web -->|Backend Service| openmcpservice
    OpenMCP_Web -->|Reverse Proxy| nginx

    OpenMCP_Plugin -->|UI Interface| renderer
    OpenMCP_Plugin -->|Core Logic| openmcpservice
    OpenMCP_Plugin -->|IDE Integration| vscode

    OpenMCP_App -->|Frontend UI| renderer
    OpenMCP_App -->|Local Service| openmcpservice
    OpenMCP_App -->|Desktop Packaging| electron

    QQBot -->|Protocol Adaptation| lagrange
    QQBot -->|Business Logic| openmcpservice

OpenMCP CLI

Quickly setup and run OpenMCP development environment with a single command:

# Install CLI globally
npm install -g @agent-ruler/openmcp

# Create a new project
openmcp init my-project
cd my-project

# Start development servers (service + renderer)
openmcp dev

CLI Commands

Command	Description
openmcp init <project-name>	Initialize a new OpenMCP project
openmcp dev	Start development mode (backend + frontend)
openmcp dev --service-only	Start only the backend service
openmcp dev --renderer-only	Start only the frontend renderer
openmcp start	Start production mode
openmcp update	Update to the latest version

📖 Full CLI Documentation

Development

• renderer : Frontend UI definitions
• service : Test components for renderer , including a simple forwarding layer
• src : VSCode plugin definitions

Renderer & Service Development

flowchart LR
D[renderer] <--> A[Dev Server] 
<--ws--> B[service]
B <--mcp--> m(MCP Server)

Project setup:

npm run setup

Start dev server:

npm run serve

Extension Development

flowchart LR
D[renderer] <--> A[extention.ts] <--> B[service]
B <--mcp--> m(MCP Server)

Build for deployment:

npm run build

build vscode extension:

npm run build:plugin

Then just press F5, いただきます (Let's begin)

---

CI Pipeline

✅ npm run build ✅ npm run build:task-loop ✅ openmcpent UT ✅ openmcp-sdk UT ✅ vscode extension UT