Overview
The Postman MCP Server is an MCP (Model Context Protocol) server that enables running Postman collections using Newman. It allows large language models (LLMs) to execute API tests and receive structured results through a standardized interface. The server supports optional environment files and global variables, enabling realistic test contexts and reusable configurations. On completion, it returns a comprehensive payload that includes an overall success flag, a test summary (total, passed, failed), any detailed failures, and execution timings (start, end, duration). It exposes a run-collection tool for submitting a collection path or URL, with optional environment and globals and an optional iterationCount to run multiple iterations. The results are designed for easy consumption by natural language agents, enabling human-friendly summaries or driving automated decisions. The server can be installed via Smithery or built manually, and is designed to integrate with Claude Desktop configurations for seamless usage with Claude and similar environments.
Features
Run Postman collections with Newman
Execute Postman collections locally through Newman via the MCP server.
Environment file support
Optional environment files provided as JSON/YAML to configure tests.
Global variables support
Include global variables to be used across test runs.
Detailed test results
Return overall status, test summary, detailed failures, and timings.
Standardized MCP interface for LLMs
Provides a consistent run-collection tool for LLM-driven test execution.
Iteration support
Support multiple runs of a collection via an optional iterationCount.
Who Is This For?
- LLMs:Enable LLMs to run and assess API tests via Postman collections.
- Developers:Integrate test execution into internal apps or CI pipelines for automated API validation.
