@frontmcp/testing provides a complete end-to-end testing framework for MCP servers. Write tests that spin up your server, call tools, and assert on results — all with type-safe fixtures and custom matchers.
Testing Overview
Complete testing guide with installation and configuration
Fixtures
Test server setup and teardown with Playwright-inspired fixtures
Custom Matchers
All available Jest matchers (
toBeSuccessful, toBeXssSafe, etc.)Interceptors
Mock providers and simulate failure scenarios