Postman MCP Server

An MCP (Model Context Protocol) server that enables running Postman collections using Newman. This server allows LLMs to execute API tests and get detailed results through a standardized interface.

Features

• Run Postman collections using Newman
• Support for environment files
• Support for global variables
• Detailed test results including:
  • Overall success/failure status
  • Test summary (total, passed, failed)
  • Detailed failure information
  • Execution timings

Development

Project Structure

src/
  ├── index.ts           # Entry point
  ├── server/
  │   ├── server.ts     # MCP Server implementation
  │   └── types.ts      # Type definitions
  └── newman/
      └── runner.ts     # Newman runner implementation
test/
  ├── server.test.ts    # Server tests
  ├── newman-runner.test.ts  # Runner tests
  └── fixtures/         # Test fixtures
      └── sample-collection.json

Running Tests

# Run tests
pnpm test

# Run tests with coverage
pnpm test:coverage

Building

# Build the project
pnpm build

# Clean build artifacts
pnpm clean

Installation

Installing via Smithery

To install Postman Runner for Claude Desktop automatically via Smithery:

npx -y @smithery/cli install mcp-postman --client claude

Manual Installation

# Clone the repository
git clone <repository-url>
cd mcp-postman

# Install dependencies
pnpm install

# Build the project
pnpm build

Usage

Configuration

Add the server to your Claude desktop configuration file at ~/Library/Application Support/Claude/claude_desktop_config.json:

{
  "mcpServers": {
    "postman-runner": {
      "command": "node",
      "args": ["/absolute/path/to/mcp-postman/build/index.js"]
    }
  }
}

Available Tools

run-collection

Runs a Postman collection and returns the test results.

Parameters:

• collection (required): Path or URL to the Postman collection
• environment (optional): Path or URL to environment file
• globals (optional): Path or URL to globals file
• iterationCount (optional): Number of iterations to run

Example Response:

{
  "success": true,
  "summary": {
    "total": 5,
    "failed": 0,
    "passed": 5
  },
  "failures": [],
  "timings": {
    "started": "2024-03-14T10:00:00.000Z",
    "completed": "2024-03-14T10:00:01.000Z",
    "duration": 1000
  }
}

Example Usage in Claude

You can use the server in Claude by asking it to run a Postman collection:

"Run the Postman collection at /path/to/collection.json and tell me if all tests passed"

Claude will:

1. Use the run-collection tool
2. Analyze the test results
3. Provide a human-friendly summary of the execution

License

ISC