Documentation

Suede Signal answers one question: when someone asks ChatGPT, Claude, Perplexity, or Gemini a question your site should be the answer to, can the engine actually find, read, and quote you?

Paste a URL on the home page and you get a 0–100 score, an A–F grade, five lane scores, every individual check with a pass/fail and a suggested fix, and a ranked "fix these first" list. The whole audit runs in a few seconds.

What the audit is (and isn't)

• Deterministic. Every check is a concrete inspection of your live page, your robots.txt, and your llms.txt. No LLM is involved in scoring, so the same page state always produces the same score.
• Read-only. The auditor fetches public pages the way a crawler would. It never logs in, submits forms, or mutates anything.
• Stateless. Nothing is stored server-side. Your scan history lives in your own browser (localStorage) so you can track score changes across visits from the same device.
• Free, no signup. Run it as often as you like, on any public site, including competitors.

It is not a rank tracker, a guarantee of citation, or a crawl of your whole site — it audits the specific URL you give it. Engines change their behavior; the audit checks the durable fundamentals that make citation possible.

How a scan works

1. You submit a URL (up to three: yours plus two competitors).
2. The server fetches the page, robots.txt, and llms.txt from the site's origin, following up to 5 redirects, with a 4 MB response cap.
3. 26 checks run across five weighted lanes: AI Crawler Access (25), Metadata & Sharing (20), Structured Data (20), Citability (25), and Trust Signals (10).
4. Lane scores are the percentage of passed checks in the lane; the overall score is the weight-adjusted average, mapped to a grade.
5. Failed checks with fixes are ranked by lane weight into the "fix these first" list.

The full check list, weights, and grade bands are documented in Scoring & lanes, and every fix is explained with copy-pasteable examples in the Fix guide.

What else is on the site?

• Competitor comparison — add up to two competitor URLs to the scan and you get a lane-by-lane head-to-head table showing exactly where you lead and where you're losing the answer.
• Mention Watch — scan Reddit and Hacker News for live threads about your brand or topic, ranked by impact, with a disclosed reply draft one click away.
• API — both features are plain HTTP endpoints you can call yourself.
• Articles — practitioner guides on llms.txt, AI crawler policy, structured data, citable writing, and where AI engines learn about brands.

Who builds this?

Suede Signal is a free tool by Suede Labs, the studio behind Suede Agent Studio — a visual builder that turns workflows like the Mention Watch loop into scheduled agents with human approval gates.