# OpenXBuild Real-Time Bidstream API

**Canonical:** https://apis.io/apis/openx/openxbuild-real-time-bidstream-api/  
**Provider:** OpenX — https://apis.io/providers/openx/  
**Documentation:** https://docs.openx.com/marketers/openxbuild/oxb-rtb-api/

OpenXBuild Real-Time Bidstream API is one of 5 APIs that [OpenX](https://apis.io/providers/openx/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include OpenRTB, gRPC, bidstream, Enrichment, and iab-artf. The published artifact set on APIs.io includes an API reference, API documentation, and a getting-started guide.

An inverted API — OpenX is the caller. A partner implements an enrichment service that OpenX hosts as a container inside its own Kubernetes namespace and calls in the auction path, either as HTTP POST /openrtb25 with an OpenRTB 2.5 BidRequest projection, or as the IAB Agentic RTB Framework gRPC RTBExtensionPoint.GetMutations over OpenRTB 2.6 protos. The service returns segment activations, extended identifiers, or deal floor overrides inside a 10 ms budget. No baseURL is recorded because the endpoint is the partner's container, assigned a port by OpenX at deployment time.

## Machine-readable artifacts (7)

- **APIReference** — https://docs.openx.com/marketers/openxbuild/oxb-rtb-api-spec/
- **Documentation** — https://docs.openx.com/marketers/openxbuild/oxb-rtb-api-artf/
- **GettingStarted** — https://docs.openx.com/marketers/openxbuild/oxb-rtb-api-get-started/
- **Protobuf** — https://raw.githubusercontent.com/api-evangelist/openx/refs/heads/main/grpc/openx-artf-rtbextensionpoint.proto
- **Protobuf** — https://raw.githubusercontent.com/api-evangelist/openx/refs/heads/main/grpc/openx-oxext.proto
- **Protobuf** — https://raw.githubusercontent.com/api-evangelist/openx/refs/heads/main/grpc/_index.yml
- **SourceCode** — https://github.com/openx/openx-enrichment-service-template

## Other OpenX APIs (4)

- [OpenX Platform API](https://apis.io/apis/openx/openx-platform-api/)
- [OpenX Reporting API](https://apis.io/apis/openx/openx-reporting-api/)
- [OpenXSelect API](https://apis.io/apis/openx/openxselect-api/)
- [OpenX MCP Server](https://apis.io/apis/openx/openx-mcp-server/)

## Tags

OpenRTB, gRPC, bidstream, Enrichment, iab-artf

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/openx/openxbuild-real-time-bidstream-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/openx/.