US college web census · gap lists · Colleges without HSTS · Puerto Rico · Puerto Rico report
Colleges without HSTS in Puerto Rico
56 colleges in Puerto Rico (57.1% of the 98 in the census list) lack HTTP Strict Transport Security header as of 2026-09-30. Who buys this: Security teams, MSPs and hosting vendors serving higher education..
The HTTPS response carried no Strict-Transport-Security header, so a first visit can still be downgraded to plain HTTP.
Free sample: 10 of 56
| Domain | Name | Control and level | City |
|---|---|---|---|
| adtecpr.com | Advantage Technical College | private for-profit less-than-2-year | Manati |
| aguadilla.inter.edu | Inter American University of Puerto Rico-Aguadilla | private nonprofit 4-year | Aguadilla |
| amtec.edu | American Technical Institute | private for-profit less-than-2-year | Bayamon |
| antillespr.edu | Antilles School of Technical Careers | private for-profit 2-year | San Juan |
| arecibo.inter.edu | Inter American University of Puerto Rico-Arecibo | private nonprofit 4-year | Arecibo |
| atlanticu.edu | Atlantic University | private nonprofit 4-year | Guaynabo |
| bccpr.org | Bayamon Community College | private for-profit less-than-2-year | Bayamon |
| br.inter.edu | Inter American University of Puerto Rico-Barranquitas | private nonprofit 4-year | Barranquitas |
| caribav.com | Caribbean Aviation Training Institute Inc | private for-profit less-than-2-year | Carolina |
| caribbean.edu | Caribbean University-Bayamon | private nonprofit 4-year | Bayamon |
Get the Puerto Rico file and more
- Puerto Rico only, 56 rows: 0.25 USDC.
GET https://colleges.agentexchange.work/leads/no-hsts/state/PR.csv - The whole list, 2,622 rows: 1.00 USDC.
GET https://colleges.agentexchange.work/leads/no-hsts.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 Puerto Rico 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":"no-hsts"} (x402). Terms.
Other gap lists in Puerto Rico
- Colleges without an accessibility statement on the homepage: 79 colleges
- Colleges without a privacy policy link on the homepage: 78 colleges
- Colleges without a security.txt: 77 colleges
- Colleges blocking both ChatGPT-User and Claude-User: 2 colleges
- Colleges answering only over plain HTTP: 6 colleges
- College homepages that redirect to another domain: 4 colleges
Other states on this list
California (278) · New York (198) · Texas (161) · Florida (143) · Pennsylvania (123) · Ohio (102) · Illinois (89) · North Carolina (75) · New Jersey (73) · Michigan (72) · Missouri (68) · Georgia (65) · Tennessee (60) · Massachusetts (59) · Virginia (57) · Kentucky (51) · Indiana (49) · Oklahoma (49) · Washington (47) · Louisiana (45) · South Carolina (41) · Alabama (40) · Kansas (40) · Arizona (39) · Colorado (37) · Iowa (35) · Wisconsin (35) · Minnesota (34) · Arkansas (32) · Mississippi (32) · Oregon (31) · Utah (27) · West Virginia (27) · Connecticut (25) · New Mexico (25) · Maryland (23) · Maine (22) · New Hampshire (16) · Idaho (15) · Hawaii (14) · Nebraska (14) · North Dakota (13) · South Dakota (13) · Nevada (12) · District of Columbia (11) · Montana (10) · DE (8) · VT (7) · AK (6) · WY (6) · RI (5) · GU (2) · AS (1) · FM (1) · MH (1) · MP (1) · VI (1)
Membership reflects the homepage and well-known files as fetched on 2026-09-30. Data licence CC BY 4.0. Not legal advice.