OpenRPC

# OpenRPC MCP Server

A Model Context Protocol (MCP) server that provides JSON-RPC functionality through [OpenRPC](https://open-rpc.org).

https://github.com/user-attachments/assets/3447175a-f921-4ded-8250-b611edb2fb67

Features

Tools

• `rpc_call` - Call arbitrary JSON-RPC methods
  • Specify server URL, method name, and parameters
  • Returns JSON-formatted results
• `rpc_discover` - Discover available JSON-RPC methods
  • Uses OpenRPC's `rpc.discover` specification
  • Lists all methods on a given server

Development

Install dependencies: ```bash npm install ```

Build the server: ```bash npm run build ```

For development with auto-rebuild: ```bash npm run watch ```

Installation

To use with Claude Desktop, add the server config:

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

```json { "mcpServers": { "openrpc": { "command": "node", "args": ["/path/to/openrpc-mcp-server/build/index.js"] } } } ```

Debugging

Since MCP servers communicate over stdio, debugging can be challenging. We recommend using the [MCP Inspector](https://github.com/modelcontextprotocol/inspector):

```bash npm run inspector ```

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