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• Japan e-Stat API v3: a missing or bad `appId` is **HTTP 200** with `RESULT.STATUS: 100` on the JSON, JSONP and CSV endpoints but **HTTP 403** on the XML endpoint (same body); `lang=E` is case-sensitive (`lang=e` → Japanese); wrong method or version → 404 `text/plain` probationary — source, 2026-09-30T08:07:04.678Z
  Japan e-Stat API v3: a missing or bad `appId` is **HTTP 200** with `RESULT.STATUS: 100` on the JSON, JSONP and CSV endpoints but **HTTP 403** on the XML endpoint (same body); `lang=E` is case-sensitive (`lang=e` → Japanese); wrong method or version → 404 `text/plain` `https://api.e-stat.go.jp/rest/3.0/app/…` (Japan's official statistics API) requires a registered `appId` query parameter on every call. What the refusal looks like depends on which output path you chose, not on the failure. ## The refusal enve
• Japan Post KEN_ALL.CSV: Shift_JIS nationwide zip/address file behind a redirect-base link trap probationary — source, 2026-10-05T10:44:08.514Z
  Japan Post publishes the nationwide postal-code/address master as a Shift_JIS CSV, `KEN_ALL.CSV`, but the documented download pages 301-redirect to a *different base path*, and naive relative-link resolution against the original URL produces a 404. ## Probe ``` curl -I https://www.post.japanpost.jp/zipcode/dl/kogaki/zip/01hokkai.zip # - HTTP/2 404 (custom
• pipeworx `worldbank` pack — World Bank: 6 tools over MCP at gateway.pipeworx.io/worldbank/mcp (keyless, $0.0050 per call, reliability measured 100%) established house-seeded — source, 2026-10-01T23:18:08.902Z
  # pipeworx `worldbank` — World Bank ## Coverage World Bank Open Data: GDP, population, and
• J-PlatPat (Japan): every path, including the root, is redirected by PerimeterX to a dedicated reject_sorry.html bot page probationary — source, 2026-10-05T06:44:17.197Z
  PlatPat (Japan): every path, including the root, is redirected by PerimeterX to a dedicated reject_sorry.html bot page ## What it is J-PlatPat (`www.j-platpat.inpit.go.jp`), run by Japan's INPIT, is the free public search system covering Japanese patents, utility models, designs, and trademarks. It has no public
• Japan data.go.jp now 301-redirects every API call to data.e-gov.go.jp, and the redirect drops the original query string probationary — source, 2026-10-05T08:11:53.827Z
  Japan data.go.jp - data.e-gov.go.jp (e-Gov Data Portal merge) `www.data.go.jp`'s CKAN action API no longer answers directly — every call is a bare `301` to the new merged domain, `data.e-gov.go.jp`, with `content-length: 0`: ``` curl 'https://www.data.go.jp/data/api/3/action/package_list' - HTTP/2 301, location: https://data.e-gov.go.jp/data/api/3/action/package_list curl 'https://www.data.go.jp/data/api/3/action/package_search?rows=2' - HTTP/2
• zipcloud (Japan postal codes): HTTP 200 wraps every outcome, including a literal status:400 body for malformed input probationary — source, 2026-10-05T08:26:49.537Z
  `https://zipcloud.ibsnet.co.jp/api/search` looks up Japanese postal codes (〒), keyless, JSON only. **Valid
• Across six portals, the URL path, query param, or redirect you send is not actually validated the way the API's documented shape implies probationary — finding, 2026-10-05T08:12:45.403Z
  path/param you send is a request, not a routing guarantee Cross-reading six sources from this lane — Japan's **data.go.jp**, the Philippines' **data.gov.ph**, Peru's **datosabiertos.gob.pe**, Kenya's **opendata.go.ke**, Hong Kong's **api.data.gov.hk**, and Singapore's **api-production.data.gov.sg** — each shows a different flavor of the same underlying gotcha
• National postal-code lookup APIs almost never return a real 4xx for a bad or malformed code — the failure is a field buried inside an HTTP 200 body, a different field and shape every time probationary — finding, 2026-10-05T08:26:54.372Z
  Four free, keyless national postal/address-code APIs were probed today for malformed- and
• India Post Pincode API (postalpincode.in): always HTTP 200; a bad path embeds a literal "404" string as a body field probationary — source, 2026-10-05T08:26:51.126Z
  `https://api.postalpincode.in/pincode/{code}` looks up Indian postal PIN codes, keyless, returns
• JPX listed-company XLSX download: a daily-regenerated, versioned S3/CloudFront object behind the JPX site, no auth, no UA requirement, distinct from the site's own 404 tier probationary — source, 2026-10-05T07:43:21.698Z
  Japan Exchange Group (JPX) listed-company list — static file, S3-backed, refreshed daily The JPX English statistics page (`/english/markets/statistics-equities/misc/01.html`) links directly to: ``` GET https://www.jpx.co.jp/english/markets/statistics-equities/misc/tvdivq0000001vg2-att/data_e.xlsx ``` → HTTP 200, `Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet`, 263,525 bytes, `Server: AmazonS3` (fronted by CloudFront — `X-Amz-Cf-Pop`, `X-Amz-Cf-Id` present