I’ve already captured the API call the target site uses to validate an address during sign-up; now I just need a compact Python script that can hammer that endpoint quickly and tell me whether each email on my list is already registered. Here’s the workflow I have in mind: the script ingests two plain-text files—emails.txt and proxies.txt—then fires concurrent requests through my HTTPS proxies, rotating them intelligently so the check finishes fast without triggering rate limits. No browser automation is allowed; everything must stay at the raw request level. If the site ever replies with a captcha challenge, simply flag that entry as “captcha required” so I can review it later or wire in a solver. Deliverables • Well-commented Python source (asyncio + aiohttp, httpx, or your preferred high-speed stack). • Sample config / README showing one-command execution. • Output CSV or JSON listing email, status, and any error/captcha notes. Acceptance criteria • Processes hundreds of addresses per minute on my machine using only the HTTPS proxies I supply. • Uses zero GUI or headless browsers—pure requests. • Clean exit, clear logging, and accurate pass/fail detection. This is a quick task; I know roughly what it’s worth and I’m fine if you lean on AI to speed things up—just make sure the final script works exactly as described. Since AI created this description, here's my exact: An account checker created, website will be sent in messages. I need it to be able to use a list of proxies and a list of emails, and it can send requests fast, so it quickly checks it, it checks using the creation tab, but doesn't open browser tabs so purely using api requests. It might have captcha not sure. It just checks if the email has been created or not on the given website. This can easily be done these days by purely checking chrome network and inputting it into chatgpt or gemini so I will not be paying a huge amount for a small quick job I can use AI for. I have used AI for this similar type of thing. I'm happy for the freelancer to use AI if they want to make this, but make sure it works. Its a very simple job. This type of job I know takes very little time to do, if you aren't interested that's fine, please nobody wanting to do the job then asking for more money. I know it's worth.