
An open-source testing tool and MCP server that uses mutation testing to measure whether a test suite catches real bugs. Integrates with Claude Code, OpenAI Codex, Cursor, Gemini CLI, and other agent clients.
Prices and medians update for the tier you select.
Ranked by how closely each one matches prove-your-tests's job. Prices show each provider's Pro state; entry prices are labelled as such. Unpriced products still belong to the market.
Market = the products most similar to this one by capability; prices are median / quartiles over its priced members, separated by provider type and buyer tier.