Descripio Amazon Reviews vs OLX Poland

Descripio Amazon Reviews is a live async review-aggregation API that pulls and caches Amazon product reviews across a dozen marketplaces, returned as JSON once a scrape job completes. It is gated by a Bearer API key on a tiered free-plus-paid plan, though cached-review reads stay unlimited and free on every tier. The live host cleanly enforces auth, rejecting both missing and invalid keys, but returns no CORS headers for cross-origin browser calls.

OLX Poland's Partner API lets approved integrators create and manage classified-ad listings and handle buyer/seller messaging programmatically. Access runs on an OAuth2 client-credentials flow, confirmed live by an invalid_client error from the real token endpoint, and the older v1 REST resource has been explicitly deprecated in favor of this OAuth-secured surface. Developer access comes through an application and approval process rather than a published self-serve fee.