Proxy & API Key Checker – Validate API keys and test proxy lists locally

Summary: A local desktop app that validates API keys and tests HTTP/HTTPS/SOCKS proxies with options for text search and headless browsing. It supports batch validation of OpenAI, Gemini, YouTube, and custom API keys with retries, jitter, and rate limiting, exporting results as CSV or JSON.

What it does

It tests proxies against target URLs using text search or headless browser screenshots and validates API keys in batches with concurrency controls and retry logic.

Who it's for

Developers and teams needing to verify API keys and proxy functionality before integration.

Why it matters

It ensures API keys and proxies are functional and reliable, preventing integration errors and improving workflow accuracy.