mcp-sdk-client-ssejs

Overview

This is a specialized client transport implementation for Model Context Protocol (MCP) designed specifically for React Native environments. It provides alternative transport implementations (SSEJSStreamableHTTPClientTransport and SSEJSClientTransport) based on sse.js, enabling MCP functionality in React Native apps when used with llama.rn. The package addresses specific challenges in React Native environments like missing CustomEvent implementations and module resolution issues.

Try asking AI

After installing, here are 6 things you can ask your AI assistant:

• listPrompts

  List available prompts

  Try:List all available prompts
• getPrompt

  Retrieve a specific prompt by name

  Try:Get the 'example-prompt' with arguments
• listResources

  List available resources

  Try:Show all available resources
• readResource

  Read a resource by its URI

  Try:Read the content of file:///example.txt
• callTool

  Call a tool with specified name and arguments

  Try:Call 'example-tool' with argument values

Comparable tools

Installation

npm install @modelcontextprotocol/sdk
npm install mcp-sdk-client-ssejs

module.exports = {
  presets: [/* ... */],
  plugins: [
    [
      'module-resolver',
      {
        alias: {
          '@modelcontextprotocol/sdk': '@modelcontextprotocol/sdk/dist/esm',
        },
      },
    ],
  ],
}

import NativeCustomEvent from 'react-native/Libraries/Events/CustomEvent'

window.CustomEvent = class CustomEvent extends NativeCustomEvent {
  constructor(type, eventInitDict = {}) {
    super(type, eventInitDict)
  }
}

FAQ

What is the difference between SSEJSStreamableHTTPClientTransport and SSEJSClientTransport?

SSEJSStreamableHTTPClientTransport supports streaming HTTP responses, while SSEJSClientTransport uses standard Server-Sent Events without streaming capabilities. Both are designed for React Native environments.

Does this package support STDIO transport?

No, this package only provides HTTP and SSE transports. STDIO transport is not supported in this implementation.

Can I use this with MCP servers other than llama.rn?

Yes, this client transport is compatible with any MCP server that provides HTTP or SSE endpoints, not just llama.rn.

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