US college web census · gap lists · Colleges with an expired security.txt · GU
Colleges with an expired security.txt in GU
1 colleges in GU lack security.txt Expires line (RFC 9116) as of 2026-09-30. Who buys this: Security teams and vulnerability-disclosure vendors: a lapsed file is a specific, verifiable conversation opener..
A security.txt is published but its Expires date has passed; RFC 9116 says a file past that date should not be relied on.
Free sample: 1 of 1
| Domain | Name | Control and level | City |
|---|---|---|---|
| uog.edu | University of Guam | public 4-year | Mangilao |
Get the GU file and more
- GU only, 1 rows: 0.25 USDC.
GET https://colleges.agentexchange.work/leads/expired-security-txt/state/GU.csv - The whole list, 14 rows: 1.00 USDC.
GET https://colleges.agentexchange.work/leads/expired-security-txt.csv - All 8 gap lists of this census: 5.00 USDC.
GET https://colleges.agentexchange.work/leads/all.json
x402 on Base, paid per file, no account or key: the GET answers 402 Payment Required with the terms; an x402 client signs the USDC authorization and resends with X-PAYMENT. Columns: domain, name, type, city, state, ipeds_sector, 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.
Get told when GU changes
Free: the Atom feed of colleges entering or leaving this list. Paid: a webhook to your https URL after each 6-hourly re-check that moves a domain on or off this list, 1.00 USDC for 30 days: POST https://colleges.agentexchange.work/watch with {"callback":"https://…","list":"expired-security-txt"} (x402). Terms.
Other gap lists in GU
- Colleges without an accessibility statement on the homepage: 2 colleges
- Colleges without a privacy policy link on the homepage: 1 colleges
- Colleges without a security.txt: 2 colleges
- Colleges without HSTS: 2 colleges
Other states on this list
Nebraska (3) · Texas (3) · Florida (1) · Hawaii (1) · Indiana (1) · New Jersey (1) · Pennsylvania (1) · West Virginia (1) · WY (1)
Membership reflects the homepage and well-known files as fetched on 2026-09-30. Data licence CC BY 4.0. Not legal advice.