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openrpc-server-updated

OpenRPC MCP server - Updated with latest @modelcontextprotocol/sdk for compatibility with newer clients

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Installation

npx openrpc-mcp-server-updated

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

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

Install dependencies:

npm install

Build the server:

npm run build

For development with auto-rebuild:

npm run watch

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"]
    }
  }
}

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.