mcp-assert
The deterministic testing standard for MCP servers. Connect over real stdio/SSE/HTTP transport, call tools with real arguments, assert results with 18 assertion types defined in YAML. Any language, any transport, no mocks. Single Go binary.
https://github.com/blackwell-systems/mcp-assert
By blackwell-systems
How to Get It
claude mcp add mcp-assert -- npx -y mcp-assert
Tip: Paste this into a Claude Code conversation. Verify command matches your Claude Code version.
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