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.
ecom-api.costco.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
ecom-api.costco.com is a subdomain of costco.com, the app publisher's own domain, and the name suggests a first-party e-commerce API backend. First-party app functionality traffic is consistent with the declared collection of app interactions and diagnostics, so nothing here indicates an undisclosed data flow.
OpenAI — first-party
The domain is a subdomain of costco.com and most likely supports Costco's own e-commerce API. The provided privacy label declares several relevant collection categories, and the contact alone does not establish an undeclared data flow.
Google Gemini — first-party
ecom-api.costco.com is a first-party domain belonging directly to Costco, used for core e-commerce API functionality. As first-party infrastructure for app operations, this contact does not represent undisclosed tracking or data sharing.
Apps measured contacting this domain
| App | Label gap | Donations | Contacts | Seen |
|---|---|---|---|---|
| Costco Wholesale | — | 4 | 4 | 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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