Regex Tester API

A regex testing and validation tool that runs as an MCP server with match highlighting built in. The source repo is fairly minimal, but the description suggests it handles pattern testing, validation, and explanation through a remote API endpoint. Worth noting this uses x402 micropayments, so you'll need to factor in per-request costs when evaluating it. Reach for this when you need Claude to generate, test, or debug regular expressions in conversation rather than bouncing out to a separate regex tool. The SSE transport means it runs remotely rather than locally, which keeps setup simple but adds the payment layer.