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---
## Official counts disagree across sources
- Germany's population for 2023 differs by 168,772 between Eurostat's Jan-1 demo_pjan figure (83,118,501, flagged as a time-series break) and World Bank's midyear SP.POP.TOTL estimate (83,287,273) — mostly a reference-date mismatch rather than independent disagreement [obj_01M4RZ2RWK9N9JNWTMMSDCJ1NA].
- Eurostat's demo_pjan reports population strictly as of January 1 each year, not a midyear estimate; Germany's 2023 observation carries an explicit break-in-series flag at that time index [obj_01M4RZ1XX4WT07KJZH72GXY18X].
- World Bank's own SP.POP.TOTL metadata documents its figures as midyear de facto estimates, crediting UN World Population Prospects, Eurostat, and national statistical offices as blended inputs rather than an independent count [obj_01M4RZ1RBGPNR48CYMDJFAWXVD].

## UN World Population Prospects (WPP) data portal
- The UN WPP data portal is only half keyless: location and indicator metadata lookups return HTTP 200 with no credential, but the actual /data/ endpoint requires a credential, checked before the id is even validated [obj_01M45PMPG7Y54Z1E7RG0DS7H35][obj_01M4RZ373HMXK5DDKT9MP21YA3].
- Metadata-only probes (locations/276 for Germany, indicators/49 for "Total population by sex") return full open metadata including source citation to the 2024 Revision of WPP [obj_01M4RZ1V6RHZY31SWVNDZM4544].

## US Census Bureau APIs
- Both the ACS national population total and the Population Estimates Program (PEP) endpoint on api.census.gov now return HTTP 200 serving a "Missing Key" HTML page rather than an error status, for requests that used to work keyless [obj_01M4RZ278NPJT3HKV3XTYMQQSQ].
- ACS's own keyless metadata catalog shows a large size gap between groups.json (1,182 groups, 348 KB) and variables.json (10.4 MB, ~30x larger); every group entry carries a JSON key literally named "universe " with a trailing space [obj_01M45QXNJCFT7KPKC3WPZYPDR2].

## Gridded and async population data
- WorldPop's stats REST API has moved its documented base from www.worldpop.org to hub.worldpop.org (301 redirect); the endpoint is an async job queue behind a plain GET that accepts any GeoJSON geometry up front, only reporting a wrong shape once the job result returns [obj_01M45PMR6V3VJH8ZWNBVCZPKGX].
- The Global Human Settlement Layer population grid (GHS-POP) has no REST API at all — it's a plain Apache directory listing on JRC's JEODPP host, with epoch/CRS/resolution baked into folder names and a 460MB global file sitting beside a tiles/ subfolder for partial downloads [obj_01M45SFF4FW1C4VNHDE7V06J3K].

## Disagreements and open questions
Eurostat's Jan-1 2023 Germany figure (83,118,501) disagrees with World Bank's midyear 2023 estimate (83,287,273) by 168,772; the gap is attributed mostly to the differing reference dates rather than independent disagreement [obj_01M4RZ2RWK9N9JNWTMMSDCJ1NA][obj_01M4RZ1XX4WT07KJZH72GXY18X].

## Possibly stale
None recorded as of 2026-10-22.

Originals stay readable; this digest is a summary, not a replacement.

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