World university web census · gap lists · census 2026-09-30 · pricing · x402 manifest
Gap lists: which universities are missing which control
8 lists computed from the census of 2026-09-30: 10,265 universities, 6,811 reachable over HTTPS. Each list is the universities whose record lacks one control. Every row is public data already in the CC BY 4.0 dumps; the lists are the filtered, country-sliceable, refreshed files a sales or compliance tool can import.
Census refresh: 2026-09-30 (counts change only when the census is rebuilt). Live re-checks: 226 universities re-checked since 2026-10-01, last run 2026-10-01 06:39 UTC, 88 changes recorded; each list's feed names who entered or left it.
| List | Universities | Of the list | Who buys this | Free | Full list |
|---|---|---|---|---|---|
| Universities without an accessibility statement on the homepage Accessibility statement linked from the homepage | 5,285 | 51.5% | Accessibility vendors and agencies (EU, UK, US), campus web platform vendors with WCAG offerings. | top 50 · feed | 1.00 USDC |
| Universities without a privacy policy link on the homepage Privacy policy linked from the homepage | 4,831 | 47.1% | Privacy-compliance vendors and agencies serving higher education. | top 50 · feed | 1.00 USDC |
| Universities without a security.txt security.txt (RFC 9116) | 6,485 | 63.2% | Security teams, vulnerability-disclosure and attack-surface vendors, MSPs serving higher education. | top 50 · feed | 1.00 USDC |
| Universities with an expired security.txt security.txt Expires line (RFC 9116) | 61 | 0.6% | Security teams and vulnerability-disclosure vendors: a lapsed file is a specific, verifiable conversation opener. | top 50 · feed | 1.00 USDC |
| Universities without HSTS HTTP Strict Transport Security header | 4,029 | 39.2% | Security teams, MSPs and hosting vendors serving higher education. | top 50 · feed | 1.00 USDC |
| Universities blocking both ChatGPT-User and Claude-User robots.txt verdicts for ChatGPT-User and Claude-User | 93 | 0.9% | AI-visibility vendors and digital agencies: these sites are closed to ChatGPT and Claude users. | top 50 · feed | 1.00 USDC |
| Universities answering only over plain HTTP HTTPS | 470 | 4.6% | MSPs, hosting and web agencies: sites still without working HTTPS. | top 50 · feed | 1.00 USDC |
| University homepages that redirect to another domain Homepage served on the listed domain | 448 | 4.4% | Web agencies and domain-consolidation vendors; security teams checking stale redirects. | top 50 · feed | 1.00 USDC |
All lists in one file: GET https://universities.agentexchange.work/leads/all.json, 5.00 USDC via x402 (8 lists, 4,307 KB).
What you get
- Free: each list page shows the first 50 rows (alphabetical) with links to every domain's record and counts by country; the same as JSON at
/leads/<list>.top.json(CORS open); an Atom feed at/leads/<list>.xmlof universities that entered or left the list on the live re-checks. - Paid, 1.00 USDC per file (x402 on Base, no account):
GET /leads/<list>.csvor.json, the full list with 19 columns (domain, name, type, city, state, known_domains, reachable, http_only, https_status, final_host, hsts, security_txt, privacy_link, accessibility_link, robots_gptbot, robots_chatgpt_user, robots_claude_user, llms_txt, title). One country:GET /leads/<list>/state/<code>.csv, 0.25 USDC. - How the lists are made: one rule per list over the census records (each list page names its rule); a control that exists but was not found where the census looked counts as missing.
Card checkout for these lists is not open yet; the x402 routes work now.
Data licence CC BY 4.0; cite Agent Exchange. Not legal advice.