Observed Signal · Jan 6, 2026 · Product Launch · Source: AdExchanger · Impact: 3/5 · Sentiment: Positive
OpenX Launches OpenXBuild Bidstream API Suite
OpenX announced OpenXBuild, a suite of three APIs designed to give advertisers closer control and visibility into programmatic bidstream activity. The suite includes Auction Insights (historical bidstream events), Identity Resolution (an audience identity graph for segment activation), and a Real‑Time Bidstream API that lets advertisers deploy custom logic and models inside OpenX infrastructure. Pilot partner tvScientific — a CTV ad‑buying startup recently acquired by Pinterest — is testing the Real‑Time Bidstream API to position its AI model nearer supply for improved tagging and bid decisioning. OpenX says the work was partly inspired by the IAB Tech Lab’s Agentic RTB Framework and reflects growing industry interest in containerized, agentic deployments within bidstream environments. OpenX and tvScientific executives described the approach as a way to increase efficiency and create feedback loops that prioritize similar impressions in future auctions.
A notable AdTech infrastructure release that enables buy‑side models to run closer to supply and could change programmatic CTV bidding workflows and identity activation, but from a mid‑sized platform rather than a major platform shift.
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Key Takeaways & Evidence Grounding
- OpenX announced OpenXBuild, a suite of three APIs for advertisers.
- OpenXBuild includes Auction Insights API, Identity Resolution API, and Real‑Time Bidstream API.
- tvScientific (a CTV ad‑buying startup recently acquired by Pinterest) is a pilot partner testing the Real‑Time Bidstream API.
- OpenX cites inspiration from the IAB Tech Lab’s Agentic RTB Framework (ARTF) for its RTB API design.
- OpenX and tvScientific say placing bidder logic closer to supply improves tagging, bid decisioning, and creates feedback loops to prioritize similar impressions.
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OpenXBuild: Revolutionizing Real-Time Ad Performance Control
OpenX Technologies announced OpenXBuild, a new software suite designed for brand and agency buyers to control ad performance in real time, leveraging first-party data and proprietary decisioning logic. OpenXBuild includes APIs such as Auction insights API (BIDS), Identity resolution API using OpenX's identity graph, and Real-time bidstream API, enabling pre-auction decisioning and lower costs. The identity API spans over 237 million US users and 150 million CTV devices, supporting cross-channel targeting. tvScientific adopted the real-time bidstream API to optimize programmatic campaigns, reporting a 70% reduction in cost-per-conversion on OpenX traffic. The solution emphasizes privacy-first data processing, low latency, and streamlined integration with fewer API calls, aiming to reduce operational overhead for buyers.
OpenX Launches OpenXBuild Real‑Time AdTech Suite
On 6 January 2026 OpenX announced OpenXBuild, a software suite for brand and agency buyers designed to enable real‑time control over ad performance, reach and insights. OpenXBuild exposes APIs including an Auction Insights API (first feature: BIDS — Bidding Intelligence Data Set), an Identity Resolution API built on OpenX’s proprietary identity graph (covering 237 million US users and 150 million CTV devices), and a Real‑time Bidstream API that lets buyers run their data and decisioning models before the auction. The product targets low‑latency, privacy‑first pre‑auction filtering across CTV, mobile, desktop and apps. tvScientific is cited as an early adopter of the real‑time bidstream API, saying it achieved a reported 70% reduction in cost‑per‑conversion on OpenX traffic.
OpenX and TVision Unveil Real-Time Attention Targeting for CTV
On 11 March 2026 OpenX Technologies launched OpenX Attention Targeting, a supply-side capability that lets advertisers target high-attention connected TV (CTV) inventory in real time. The solution is powered by TVision’s CTV attention measurement and is available exclusively through OpenXSelect. TVision’s passive, in-home person-level panel feeds predictive attention models that are combined with OpenX bidstream signals (time of day, device type, viewing duration) to enable pre-bid targeting across TV by OpenX supply. Advertisers can apply attention targeting to curated deals via self-serve or managed workflows, layer attention with audience, content, and contextual targeting, and access reach via OpenX’s identity graph (231M+ monthly uniques). OpenX and TVision position the launch as a move from post-campaign attention measurement to real-time optimisation of CTV performance.
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