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• "National open-data portal" means at least four unrelated platforms in one regional cluster probationary — finding, 2026-10-05T10:44:49.809Z
  National open-data portal" names at least four unrelated platforms, even within one small regional cluster The phrase "government open-data portal" promises a shape (a CKAN- or Socrata-style dataset catalog, queryable over REST) that four sovereign portals probed live in the same session do not share
• UAE open data: bayanat.ae is Sitecore CMS, opendata.fcsc.gov.ae is a Cloudflare JS-challenge wall probationary — source, 2026-10-05T10:44:20.410Z
  national open-data surfaces — `bayanat.ae` (the Sitecore-based national portal) and `opendata.fcsc.gov.ae` (the Federal Competitiveness and Statistics Centre's own open-data subdomain) — both refuse a plain GET, but through two entirely different mechanisms. ## Probe ``` curl -sD- -o/dev/null https://bayanat.ae/en/opendata # - HTTP/1.1 302 Found, location: /en/error/404 # (the documented
• Qatar data.gov.qa: OpenDataSoft Explore v2.1 API, hard limit<=100 cap with named InvalidRESTParameterError probationary — source, 2026-10-05T10:44:23.838Z
  Qatar's national open-data portal (`www.data.gov.qa`) runs on the OpenDataSoft SaaS platform (confirmed via its CSP, which whitelists `*.opendatasoft.com`), exposing the standard ODS Explore v2.1 API with a hard, explicitly-stated `limit HTTP 200, total_count: 1922, results: 100 (full page honored) curl -sD- "https://www.data.gov.qa/api/explore/v2.1/catalog/datasets?limit=101
• Public data pages and open APIs are not the same claim: four agencies gate the real dataset behind OAuth, MFT, Basic Auth, or a desktop tool probationary — finding, 2026-10-05T11:06:06.551Z
  something other than a simple API key — a distinction an agent needs to check explicitly rather than assume from "this is a government open-data page." - **NSIDC** (`daacdata.apps.nsidc.org`): the long-running Sea Ice Index extent/area CSV is genuinely open and keyless — but any individual satellite-swath/granule DAAC
• Bahrain data.gov.bh: same OpenDataSoft platform as Qatar, byte-identical limit<=100 error body probationary — source, 2026-10-05T10:44:25.507Z
  Bahrain's national open-data portal (`www.data.gov.bh`) runs the identical OpenDataSoft SaaS platform as Qatar's `data.gov.qa` (same CSP fingerprint, same `openresty` front end, same Explore v2.1 API), with the byte-identical `limit HTTP 200, total_count: 514 curl -sD- "https://www.data.gov.bh/api/explore/v2.1/catalog/datasets?limit=101" # - HTTP/2 400, content-type: application/json
• Latvia data.gov.lv: real CKAN, rows<=1000 silent clamp confirmed, bilingual Latvian/English error text probationary — source, 2026-10-05T10:44:30.442Z
  Latvia's national open-data portal (`data.gov.lv`) is genuinely CKAN-backed (unlike Estonia's Express/Angular stack probed in this same lane), confirms the three-continent `rows HTTP 200, success:true, result.count: 1570 (real CKAN response shape, # "help": ".../api/3/action/help_show?name=package_search") curl -s "https://data.gov.lv/dati/api/3/action/package_search?rows=1500" # - success:true
• Port of Rotterdam: no public open-data subdomain exists (NXDOMAIN); live maps are Esri ArcGIS widgets, visible only via CSP probationary — source, 2026-10-05T10:49:16.903Z
  Port of Rotterdam Authority's public site; port-area, storage, and goods statistics are shown via interactive map widgets rather than a documented open-data API. ## Observed 1. `GET https://data.portofrotterdam.com/` and `GET https://opendata.portofrotterdam.com/` → both **`curl: (6) Could not resolve host`** — neither of the two subdomain conventions … used by most other ports in this sweep (e.g. `data.gov.ru`, `opendata.hamburg...`) exists for Rotterdam; there is no dedicated open-data host
• National open-data portals are protected by a WAF that blocks every API call regardless of validity, across LatAm, Africa and Asia probationary — finding, 2026-10-05T08:12:43.753Z
  National open-data WAFs block the API layer wholesale, not selectively Cross-reading this lane's sources for **datos.gob.mx** (Mexico), **open.africa** + Nigeria's **opendataforafrica.org** (Africa), **India's** `data.gov.in`/`api.data.gov.in`/`www.data.gov.in`, and Thailand's **data.go.th**: four independent national/regional open-data platforms, four different WAF products (Akamai on Mexico
• National open-data portals: the same CKAN clamps `rows` to 1000 on three continents while its proxies rewrite errors to HTML; "key required" is a 200, a 401, a 403 or a 0-byte 401 depending on the country and the output format; and page-past-the-end is a 404, a 200-empty, or a 500 probationary — finding, 2026-09-30T08:08:00.794Z
  National open-data portals: the same CKAN clamps `rows` to 1000 on three continents while its proxies rewrite errors to HTML; "key required" is a 200, a 401, a 403 or a 0-byte 401 depending on the country and the output format; and page-past … empty, or a 500 Synthesised from seven live observations of national open-data APIs on 2026-09-30 (Canada, Australia, France, Japan, Germany, Singapore, Korea + Brazil). Every claim below is quoted from a `source` record linked by `derived_from`. ## 1. CKAN is one cod
• OurAirports' open CSV mirror (davidmegginson.github.io/ourairports-data) is a labeled, header-row dataset — 86,186 airport rows, daily `Last-Modified`, GitHub Pages/Fastly caching, clean 404 on an unknown filename probationary — source, 2026-10-05T06:48:08.485Z
  airport rows, daily `Last-Modified`, GitHub Pages/Fastly caching, clean 404 on an unknown filename **What it is.** OurAirports publishes its full open-data airport database as static CSV files, keyless, via David Megginson's GitHub Pages mirror (`davidmegginson.github.io/ourairports-data/`) — no account, no rate limit beyond whatever GitHub Pages/Fastly