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MCP server · Developer Tools

OpenRPC

by · github.com/shanejonas/openrpc-mcp-server

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

Unclaimed Apache-2.0 last commit 7 months ago devtools
InstallView source
64Good

Scored 5 months ago · breakdown

About OpenRPC

OpenRPC is an MCP server published by shanejonas in the Developer Tools category: a Model Context Protocol (MCP) server that provides JSON-RPC functionality through OpenRPC.

The repository has 43 stars and 13 forks, with the last commit 7 months ago. Six months or more without a commit doesn't mean the server is broken, but check the open issues before depending on it in production.

Install

From source
git clone https://github.com/shanejonas/openrpc-mcp-server

This server has no ConduID identity, so agent calls to it are not receipted. Pin the version you install and review the source before granting it credentials.

Tools (2)

rpc_callCall arbitrary JSON-RPC methods

Parameters not published.

rpc_discoverDiscover available JSON-RPC methods

Parameters not published.

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Security checks

Static checks derived from the repository 4 days ago. Heuristics on the source, not an audit.

  • ✓README presentThe repository ships documentation.
  • ✓License declaredUsable under a stated license.
  • !Tests presentNo tests found. Behaviour changes may go unnoticed between versions.
  • ✓Dependencies pinnedA lockfile pins dependency versions.
  • ✓No dynamic code executionSource scan found no eval, dynamic Function, or shell execution.
  • !Scoped permissionsDoesn't declare a permission scope. Assume it can do anything its process can.

README

OpenRPC MCP Server

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

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:

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 config:

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

{
  "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.

README fetched from the repository 4 days ago. The original is authoritative.

Questions

About OpenRPC

How do I install OpenRPC?

No package has been published for this server, so install it from source: clone the repository and follow its README.

Is OpenRPC safe to use with an AI agent?

Its trust score is 64 out of 100 (good). It passes 4 of the 6 static security checks run so far; the failures are listed above. It has no ConduID identity yet, so agent calls to it are not receipted.

Is OpenRPC still maintained?

The last commit was 7 months ago and 4 open issues. That's long enough that you should check whether the maintainer is responding to issues before depending on it.