📌Overview

Purpose: To provide a Model Context Protocol (MCP) server that enables JSON-RPC functionality using OpenRPC.

Overview: The OpenRPC MCP Server facilitates the implementation of JSON-RPC methods, allowing developers to create and interact with RPC services efficiently. It supports method discovery and offers an easy way to communicate over standardized RPC protocols.

Key Features:

• rpc_call: This feature allows users to call arbitrary JSON-RPC methods by specifying the server URL, method name, and parameters. It returns the results in a JSON format, facilitating seamless interaction with RPC services.

• rpc_discover: This feature enables the discovery of available JSON-RPC methods on a given server utilizing OpenRPC's discovery specification. It provides a comprehensive list of methods, enhancing the usability and accessibility of the server.

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OpenRPC MCP Server

A Model Context Protocol (MCP) server that provides JSON-RPC functionality through OpenRPC.

Features

Tools

• rpc_call
  Call arbitrary JSON-RPC methods by specifying server URL, method name, and parameters. Returns JSON-formatted results.

• rpc_discover
  Discover available JSON-RPC methods using OpenRPC's rpc.discover specification. Lists all methods on a given server.

Development

Install dependencies:

npm install

Build the server:

npm run build

For development with auto-rebuild:

npm run watch

Installation

To use with Claude Desktop, add the server configuration:

• On MacOS: ~/Library/Application Support/Claude/claude_desktop_config.json
• On Windows: %APPDATA%/Claude/claude_desktop_config.json

Example config:

{
  "mcpServers": {
    "openrpc": {
      "command": "npx",
      "args": ["-y", "openrpc-mcp-server"]
    }
  }
}

Debugging

Since MCP servers communicate over stdio, debugging can be challenging. We recommend using the MCP Inspector:

npm run inspector

The Inspector will provide a URL to access debugging tools in your browser.