OpenX — independent programmatic ad exchange and supply-side platform (SSP).
OpenX is a Pasadena, California-headquartered independent ad exchange that connects publishers and app developers to advertiser demand through an OpenRTB-based real-time marketplace spanning display, video, CTV, native, and mobile inventory. Its product suite includes the OpenX Exchange, OpenXSelect (curation and deal creation), OpenXBuild (custom supply-side toolkit and real-time bidstream), and OpenXControl (publisher yield management).
APIs documented (references gated behind OAuth at docs.openx.com):
- OpenRTB API — DSP bidding integration
- Platform API — accounts, inventory, demand, targeting, deals
- Reporting API — analytics and performance metrics
- OpenXSelect GraphQL API — audiences, deals, inventory lists
- OpenXBuild Real-Time Bidstream API
OpenX does not publish a public OpenAPI specification or Postman collection; access to API references requires an OpenX account login. OpenX is also a foundational contributor to the Prebid.org header-bidding ecosystem (Prebid.js and Prebid Server).
URL: Visit APIs.json