
MCP Server Testing Web App
This web application allows users to input an MCP server configuration in JSON format, verify its connectivity and functionality, and display results. The app runs on a Node.js backend and a React Frontend, and is deployed on Vercel.
🚀 Features
- Accepts MCP server configuration as JSON input.
- Tests server connectivity by running the mcp server on backend.
- Displays results in a user-friendly interface.
- Backend implemented using Node.js (Express).
🛠️ Setup Instructions
1️⃣ Clone the Repository
git clone https://github.com/KartikeyM18/mcp-server-tester.git
cd mcp-server-tester
2️⃣ Install Dependencies
cd backend
npm install
cd frontend
npm install
3️⃣ Run the Backend Server
cd backend
node src/index.js
By default, the backend runs on http://localhost:3000
.
4️⃣ **Create .env in the Frontend **
Just create .env
in the frontend folder and add this -
VITE_API_URL=http://localhost:3000/check-mcp
5️⃣ **Run the Frontend **
npm run dev
🏗️ Approach
-
Frontend:
- Accepts JSON input from the user.
- Sends MCP server config to the backend via an API request.
- Displays server status by running the mcp server in backend.
-
Backend:
- Receives JSON input from the frontend.
- Executes the MCP server test command using
spawn(command, args)
. - Connects to the MCP server via WebSockets to fetch available tools.
- Returns results to the frontend.
📌 Example JSON Input
{
"mcpServers": {
"server-sequential-thinking": {
"command": "npx",
"args": [
"-y",
"@smithery/cli@latest",
"run",
"@smithery-ai/server-sequential-thinking",
"--config",
"{}"
]
}
}
}
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Reviews

user_zEjNrKZF
I recently started using mcp-server-tester by KartikeyM18, and it has been an absolute game-changer for my server testing needs. The tool is incredibly efficient and user-friendly, making the process seamless and hassle-free. Plus, the support and documentation available at https://github.com/KartikeyM18/mcp-server-tester are top-notch. Highly recommend it to anyone in need of a reliable server testing solution!