Crate pulseengine_mcp_client 

MCP Client Implementation

This crate provides a client for connecting to MCP (Model Context Protocol) servers. It enables programmatic interaction with MCP servers for testing, proxying, and building multi-hop MCP architectures.

Quick Start

use pulseengine_mcp_client::{McpClient, StdioClientTransport};
use tokio::process::Command;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    // Spawn an MCP server as a child process
    let mut child = Command::new("my-mcp-server")
        .stdin(std::process::Stdio::piped())
        .stdout(std::process::Stdio::piped())
        .spawn()?;

    // Create transport from child process streams
    let stdin = child.stdin.take().unwrap();
    let stdout = child.stdout.take().unwrap();
    let transport = StdioClientTransport::new(stdin, stdout);

    // Create and initialize client
    let mut client = McpClient::new(transport);
    let server_info = client.initialize("my-client", "1.0.0").await?;
    println!("Connected to: {}", server_info.server_info.name);

    // Use the server
    let tools = client.list_tools().await?;
    for tool in tools.tools {
        println!("Tool: {}", tool.name);
    }

    Ok(())
}

Structs

CallToolRequestParam

Tool call parameters

CallToolResult

Tool call result

CompleteRequestParam

Completion request parameters

CompleteResult

Complete result

GetPromptRequestParam

Get prompt parameters

GetPromptResult

Get prompt result

Implementation

Server implementation information

InitializeResult

Initialize result

ListPromptsResult

List prompts result

ListResourceTemplatesResult

List resource templates result

ListResourcesResult

List resources result

ListToolsResult

List tools result

McpClient

MCP Client for connecting to MCP servers

Prompt

Prompt definition

ReadResourceRequestParam

Read resource parameters

ReadResourceResult

Read resource result

Resource

Resource definition

ResourceTemplate

Resource template definition

ServerCapabilities

Server capabilities configuration

StdioClientTransport

Standard I/O transport for MCP client

Tool

Tool definition

Enums

ClientError

Errors that can occur during MCP client operations

Traits

ClientTransport

Trait for client-side MCP transport

Type Aliases

ClientResult

Result type alias for client operations