OpenRPC MCP Server

@shanejonas

About OpenRPC MCP Server

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

Config

Add this server to your MCP-compatible client using the configuration below.

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

Tools

Call any JSON-RPC method on a server with parameters. A user would prompt: Call method <method> on <server url> with params <params>

This uses JSON-RPC to call `rpc.discover` which is part of the OpenRPC Specification for discovery for JSON-RPC servers. A user would prompt: What JSON-RPC methods does this server have? <server url>

Overview

What is OpenRPC MCP Server?

The OpenRPC MCP Server is a Model Context Protocol server that provides JSON-RPC functionality through the OpenRPC specification. It allows users to call arbitrary JSON-RPC methods and discover available methods on any JSON-RPC server.

How to use OpenRPC MCP Server?

Install with npm install, build with npm run build, and configure as an MCP server in Claude Desktop by adding the provided JSON to the desktop config file. Run with npx -y openrpc-mcp-server. The server exposes two tools: rpc_call and rpc_discover.

Key features of OpenRPC MCP Server

rpc_call tool for calling any JSON-RPC method
rpc_discover tool to discover methods via OpenRPC
Built on the OpenRPC specification
Easy integration with Claude Desktop
Supports development with npm scripts

Use cases of OpenRPC MCP Server

Call arbitrary JSON-RPC methods from an MCP client
Discover all available methods on a JSON-RPC server
Automate JSON-RPC interactions within a Claude workflow
Debug and test JSON-RPC endpoints using MCP tools

FAQ from OpenRPC MCP Server

What does the OpenRPC MCP Server do?

It provides an MCP interface to call and discover JSON-RPC methods using the OpenRPC specification.

What are its dependencies?

It requires Node.js and is run via npx -y openrpc-mcp-server.

How do I install the OpenRPC MCP Server?

Add the server configuration to the Claude Desktop config file (on MacOS: ~/Library/Application Support/Claude/claude_desktop_config.json, on Windows: %APPDATA%/Claude/claude_desktop_config.json) as shown in the README.

How do I debug the server?

Use the MCP Inspector by running npm run inspector in the project directory.

What tools does it provide?

Two tools: rpc_call for calling methods and rpc_discover for discovering methods.

Frequently asked questions

What does the OpenRPC MCP Server do?

It provides an MCP interface to call and discover JSON-RPC methods using the OpenRPC specification.

What are its dependencies?

It requires Node.js and is run via `npx -y openrpc-mcp-server`.

How do I install the OpenRPC MCP Server?

Add the server configuration to the Claude Desktop config file (on MacOS: `~/Library/Application Support/Claude/claude_desktop_config.json`, on Windows: `%APPDATA%/Claude/claude_desktop_config.json`) as shown in the README.

How do I debug the server?

Use the MCP Inspector by running `npm run inspector` in the project directory.

What tools does it provide?

Two tools: `rpc_call` for calling methods and `rpc_discover` for discovering methods.

Comments

Basic information

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