Postman MCP Server

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.

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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

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

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

Contributing

1. Fork the repository
2. Create your feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add some amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

License

ISC