This page aggregates measured, corroborated evidence: donors' iPhones recorded apps contacting this domain, every claim below was reported by separate accepted donations and published under a human verdict (later rows for an approved app inherit its verdict). A contact is a measurement, not an accusation — it does not show what data was sent.
arcus-uswest.amazon.com
classified as first-party · 2
What our research panel found AI-drafted · human-reviewed
We ask several independent AI models the same question and publish their answers separately — cross-vendor agreement is evidence against fabrication, and disagreement is worth seeing. 3 of 3 models answered, overall confidence high. A human reviewed this domain's claims before anything here published.
Anthropic Claude — first-party
arcus-uswest.amazon.com is a subdomain of amazon.com, the app publisher's own domain, so it is a first-party endpoint (its specific internal function is not something I can confirm). Amazon's label already declares extensive collection including app interactions, device IDs, and diagnostics, so this contact implies no data flow outside the declared label.
OpenAI — first-party
The domain is under amazon.com and is most likely Amazon infrastructure for the Amazon Shopping app. The privacy label declares extensive collection and sharing categories, so this contact alone does not imply an uncovered data flow.
Google Gemini — first-party
The domain arcus-uswest.amazon.com belongs to Amazon, making it a first-party endpoint for the Amazon Shopping app. First-party infrastructure traffic does not indicate undisclosed data collection.
Apps measured contacting this domain
| App | Label gap | Donations | Contacts | Seen |
|---|---|---|---|---|
| Amazon Shopping | — | 7 | 60 | 2026-07-28 → 2026-07-30 |
| Amazon Business: B2B Shopping | — | 4 | 25 | 2026-07-28 → 2026-07-29 |
The corpus grows one report at a time: donate your App Privacy Report — anonymous by design.
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