MCP Test Harness

Version updated for https://github.com/vaquarkhan/mcp-test-harness to version v3.0.8.

  • This action is used across all versions by ? repositories.

Action Type

This is a Composite action.

Go to the GitHub Marketplace to find the latest changes.

Action Summary

MCP Test Harness is a CI gate for MCP servers, ensuring that AI agents’ connectors work correctly before deployment. It automates deterministic tests using pytest-style syntax, providing JUnit/SARIF reports and conformance badges to audit and govern the server’s functionality. The action supports multiple transports (stdio, SSE, HTTP) and integrates seamlessly with GitHub Actions, JUnit consumers, and Code Scanning for comprehensive testing coverage and security checks.

What’s Changed

Highlights

  • Dual-mode MCP testing: stateful flows unchanged; new SEP-2575 stateless path for Streamable HTTP (2026-07-28)
  • mcp-test conformance stateless — adversarial certification gate + README badge
  • assert_stateless_throughput — protocol-aware hyperscale load without initialize handshake
  • Docs: TUTORIAL_STATELESS.md, RFC-006, examples, stateless-dual-mode.svg diagram

Install

pip install mcp-test-harness==3.0.8
docker pull ghcr.io/vaquarkhan/mcp-test-harness:3.0.8

All 18 PyPI artifacts aligned at 3.0.8.