mcpjs
MCP JSON-RPC client/server example in JavaScript. mcpjs is a Model Context Protocol (MCP) server maintained by melvincarvalho. It connects to MCP-compatible clients such as Claude Desktop, Cursor, Cline, and other agents that speak the protocol. It exposes 2 tools, including initialize and echo, that an agent can call directly. It is categorized under Tool/Server and Development/JavaScript.
What is this MCP
This is a simple implementation of a Model Context Protocol (MCP) using JSON-RPC for client-server communication in JavaScript. It demonstrates basic MCP-inspired interactions with initialize and echo methods.
How to use this MCP
node server.js to start the servernode client.js in another terminal to test the connectionWhat this MCP can be used for
- Learning MCP/JSON-RPC basics
- Building simple AI agent communication systems
- Creating a foundation for more complex MCP implementations
AIMCP authority
DR and traffic signal for the AIMCP public domain.
Frequently asked questions
What is the mcpjs MCP server?
mcpjs is a Model Context Protocol server from melvincarvalho. It lets MCP-compatible AI clients call its tools over a standard interface, so agents like Claude, Cursor, and Cline can use it without custom integration.
How do I connect mcpjs to my AI client?
Add mcpjs to your client's MCP configuration using the stdio or SSE connection shown in the usage examples on this page, then restart the client to load the server.
What tools does mcpjs provide?
mcpjs provides 2 tools: initialize and echo.
Is mcpjs free to use?
mcpjs is listed on AIMCP for free. Any API keys or accounts required by the underlying service are set by its provider.
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