OpenX

OpenXBuild Real-Time Bidstream API

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.

GitHub

Documentation

📖
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/

Other Resources

🔗
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

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This API 
curl "https://apis.io/api/v1/apis/openxbuild-real-time-bidstream-api"
All apis 
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

API entry from apis.yml

apis.yml Raw ↑ 
aid: openx:openxbuild-real-time-bidstream-api
name: OpenXBuild Real-Time Bidstream API
description: 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.
humanURL: https://docs.openx.com/marketers/openxbuild/oxb-rtb-api/
tags:
- OpenRTB
- gRPC
- bidstream
- Enrichment
- iab-artf
tags_raw:
- openrtb
- grpc
- bidstream
- enrichment
- iab-artf
properties:
- url: https://docs.openx.com/marketers/openxbuild/oxb-rtb-api-spec/
  type: APIReference
- url: https://docs.openx.com/marketers/openxbuild/oxb-rtb-api-artf/
  type: Documentation
- url: https://docs.openx.com/marketers/openxbuild/oxb-rtb-api-get-started/
  type: GettingStarted
- url: grpc/openx-artf-rtbextensionpoint.proto
  type: Protobuf
- url: grpc/openx-oxext.proto
  type: Protobuf
- url: grpc/_index.yml
  type: Protobuf
- url: https://github.com/openx/openx-enrichment-service-template
  type: SourceCode