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tarn

CLI-first API testing tool with structured JSON failures (`failure_category`, `error_code`, `hints`) so AI agents can branch on the taxonomy without parsing stderr. MCP tools: `tarn_run`, `tarn_validate`, `tarn_fix_plan`, `tarn_inspect`, `tarn_rerun_failed`, and more. Tests are `.tarn.yaml`. Single static binary (musl), MIT.

Rust Local macOSWindowsLinux
★ 5 stars Last pushed 2026-06-04 License: MIT

Topics: Developer Tools

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See the repository for installation instructions: https://github.com/NazarKalytiuk/tarn

Related servers

Listed in punkpeye/awesome-mcp-servers (MIT)