Case study · 29 August 2026 · every claim links to stored evidence
Invisible to Callable in one night
The first site this scanner ever audited hard was itself. It did not go well — and that is the point of this page. The ladder is climbable, quickly, and here is the receipt.
23:00 — the scanner scans itself and scores rung 0
Hours after going live, we pointed the Scan at its own domain. Verdict: Invisible. No robots.txt, no sitemap, no llms.txt, no structured data — the same basics we flag on every scan, absent from the tool doing the flagging. The cobbler's children, measured and timestamped.
The climb — the same steps we prescribe
| Step | Effort | Dimension it moved |
|---|---|---|
| robots.txt welcoming agents + sitemap.xml | Minutes | D1 Legibility |
| llms.txt — what we are, in our words, for machines | An afternoon's writing, tops | D1 Legibility |
| Structured data (what this application is, who made it) | Minutes | D1 + D5 Standing |
| WebMCP tools registered on every page, with a detectable manifest | The guide's ~30 lines | D3 Callability |
MCP discovery at /.well-known/mcp, pointing agents to the callable /mcp endpoint | An evening | D3 Callability |
By the small hours — rung 3, Callable, D3 = 100/100
The re-scan found the llms.txt, the markup, the registered tools and the MCP endpoint — and moved the verdict to Callable, the only rung-3 site in the corpus so far. Same scanner, same rules as every other site, evidence stored: the live, dated scan page is here. It re-runs on demand; we cannot quietly edit history.
Proof it isn't theoretical: open this site in ChatGPT's desktop browser and ask it to scan something. The tools this page registers are the ones it will use — and that interaction is how our Observatory logged its first real AI agent within an hour of launch.
What this means for your site
Every step above is available to any business, mostly without code. The distance from Invisible to Readable is a text file; from Readable to Callable is one exposed capability. The corpus says almost nobody has taken those steps yet — which is precisely the opportunity.