Blah-mcp-test NPM

blah-mcp-test

A command-line tool for testing MCP (Model Context Protocol) tools with any OpenAI model. This tool integrates a client and server in a single process, making it easy to test and interact with MCP tools.

Features

Integrated MCP client and server in a single CLI tool
Support for any OpenAI model
Configurable via CLI arguments or configuration file
Beautiful console output with detailed logging
Easy tool discovery and execution

Installation

npm install -g blah-mcp-test

Environment Setup

Create a .env file in your project directory by copying the example:

cp .env.example .env

Then edit .env and add your configuration:

# MCP Server Configuration
BLAH_HOST=https://ajax-blah.web.val.run

# OpenAI API Configuration
OPENAI_API_KEY=your_api_key_here

Quick Start

# Set required environment variables
export BLAH_HOST=https://ajax-blah.web.val.run
export OPENAI_API_KEY=your_api_key

# Run with default options
blah-mcp-test --prompt "What is the capital of France?"

# Run with custom model and system prompt
blah-mcp-test \
  --model gpt-4o-mini \
  --systemPrompt "You are a helpful assistant" \
  --prompt "What is the capital of France?"

# Use a configuration file
blah-mcp-test -c ./my-config.json --prompt "Create a tool that generates random numbers"

Configuration

You can configure the tool in three ways (in order of precedence):

Command-line arguments
Configuration file (blah-mcp-test.json)
Environment variables

Command-line Options

Options:
  -V, --version              output version number
  -m, --model <model>        OpenAI model to use (default: "gpt-4o-mini")
  -s, --systemPrompt <text>  System prompt for the AI (default: "You are a helpful assistant")
  -p, --prompt <text>        User prompt to send
  -c, --config <path>        Path to config file (default: "./blah-mcp-test.json")
  --host <url>              BLAH_HOST value
  --openai-key <key>        OpenAI API key
  -h, --help                display help for command

Configuration File

Create a blah-mcp-test.json in your project directory:

{
  "model": "gpt-4o-mini",
  "systemPrompt": "You are a helpful assistant",
  "host": "https://ajax-blah.web.val.run",
  "openaiKey": "your_api_key"
}

Environment Variables

BLAH_HOST: The host URL for the MCP server (required)
OPENAI_API_KEY: Your OpenAI API key (required)

Example Use Cases

Creating a New Tool

# Create a tool that generates random numbers
blah-mcp-test --prompt "Create a tool that generates random numbers between a min and max value"

# Create a tool that fetches weather data
blah-mcp-test --prompt "Create a tool that fetches weather data for a given city"

Using Existing Tools

# Use the LOTR horoscope tool
blah-mcp-test --prompt "What's my Lord of the Rings horoscope for birthdate 03-14?"

# Generate a random letter
blah-mcp-test --prompt "Generate a random letter between A and Z"

Development

# Clone the repository
git clone https://github.com/yourusername/blah-mcp-test.git
cd blah-mcp-test

# Install dependencies
npm install

# Run in development mode
npm run dev -- --prompt "Your test prompt"

# Build for production
npm run build

# Run the built version
npm start -- --prompt "Your test prompt"

Architecture

The tool consists of three main components:

CLI Interface: Handles command-line arguments and configuration loading
MCP Server: Manages tool discovery and execution
MCP Client: Handles communication with the AI model and tool selection

Flow Diagram

┌─────────────┐    ┌──────────────┐    ┌───────────────┐
│  CLI Input  │───▶│  MCP Server  │◀───▶│  BLAH_HOST    │
└─────────────┘    └──────────────┘    └───────────────┘
                          ▲
                          │
                   ┌──────┴──────┐
                   │  MCP Client  │
                   └──────┬──────┘
                          │
                   ┌──────┴──────┐
                   │ OpenAI API   │
                   └─────────────┘

Troubleshooting

Common Issues

Missing Environment Variables
```
Error: BLAH_HOST must be provided
```
Solution: Set the BLAH_HOST environment variable or provide it in the config file
OpenAI API Key Issues
```
Error: OpenAI API key is required
```
Solution: Set the OPENAI_API_KEY environment variable or provide it in the config file
Tool Not Found
```
Error: Tool 'xyz' was not found
```
Solution: Check the available tools list and ensure you're using the correct tool name