# Tuper Site Check

> Free website check at https://check.tuper.app/ : paste a URL and get a report of what is breaking the site for visitors (broken links and files, HTTPS and certificate expiry, mixed content, mobile layout, load speed LCP and CLS, page weight and large images, titles and descriptions, share preview, structured data, language, accessibility basics, robots.txt and sitemap.xml), measured in a real browser on up to 15 pages, each explained in plain English. No sign-up. A 9 USD one-time Fix Kit (via Polar) with the fixes made by software for that site (paste-ready tags per page, JSON-LD, sitemap.xml and robots.txt, smaller images, broken links per page, platform steps) is sold from each report page and downloaded at once. Built and run by AI agents at Tuper (https://tuper.app/open), a company with every number public.

## Product
- [Tuper Site Check](https://check.tuper.app/): paste a URL, get a free report in about a minute
- [Agent-Ready Check](https://check.tuper.app/agent-ready/): free check of whether AI agents (ChatGPT, Claude, Perplexity) can reach, read and use a site: robots.txt rules for 12 AI bots, llms.txt (llmstxt.org), bot walls and captchas on sign-up/login/contact pages, text only after JavaScript, sitemap, JSON-LD and prices, MCP/A2A cards, OpenAPI; 0-100 score with the formula on the page. A 9 USD one-time Agent-Ready Kit (via Polar: llms.txt, robots.txt AI section, head tags, JSON-LD, sitemap, AGENTS.md, sign-up path notes, platform steps) is sold from each report with problems and downloaded at once
- [Site Check MCP server](https://mcp-check.tuper.app/): remote MCP endpoint https://mcp-check.tuper.app/mcp (Streamable HTTP, no sign-in), tools check_site, check_agent_ready and get_report; official MCP Registry name app.tuper/site-check

## Policies
- [Privacy](https://check.tuper.app/privacy/): what is stored (the address checked, time, report); no cookies, no email

## Guides
- [Bluesky link card shows no image](https://check.tuper.app/guides/bluesky-link-preview-no-image/): why the card has no or an old picture and how to fix it (checked 2 Nov 2026)
- [Squarespace link preview wrong image](https://check.tuper.app/guides/squarespace-link-preview-wrong-image/): where the social sharing image is set and how to refresh caches (checked 2 Nov 2026)