Supply Transparency

How buyers verify CloudX publisher inventory across app-ads.txt, sellers.json, and OpenRTB schain.

For CloudX-settled requests, one publisher seller ID connects three IAB transparency sources: the publisher’s app-ads.txt file, CloudX’s sellers.json, and the request’s SupplyChain object.

The matching rule

On a request with imp.ext.cloudx.settlement: "cloudx":

OpenRTB 2.6 places the object at source.schain. OpenRTB 2.5 places it at source.ext.schain.

{
  "id": "auction-123",
  "app": {
    "publisher": { "id": "publisher-456" }
  },
  "imp": [{
    "ext": {
      "cloudx": { "settlement": "cloudx" }
    }
  }],
  "source": {
    "schain": {
      "complete": 1,
      "ver": "1.0",
      "nodes": [{
        "asi": "cloudx.io",
        "sid": "publisher-456",
        "rid": "auction-123",
        "hp": 1
      }]
    }
  }
}

Verify a request

1. Confirm imp.ext.cloudx.settlement is "cloudx".
2. Read app.publisher.id and the CloudX schain node.
3. Find that seller ID in CloudX sellers.json.
4. Resolve the app’s developer domain from its store listing and verify its public app-ads.txt contains the matching CloudX DIRECT line.

Direct and resold lines

DIRECT means the publisher has a direct account relationship with the advertising system named in that line. CloudX’s own authorization line uses cloudx.io and the publisher’s CloudX seller ID.

A publisher can also have lines for other demand systems. Those systems decide whether their line is DIRECT or RESELLER; that relationship does not change the meaning of the CloudX line. Evaluate each advertising-system domain independently.

Publication controls

CloudX sellers.json:

• Lists enabled publisher accounts with a name and domain
• Publishes them as seller_type: "PUBLISHER"
• Publishes seller identities with is_confidential: 0
• Publishes cloudx.io in the sellers.json TAG-ID identifier field; this is not a TAG certification claim

Publishers can use the CloudX app-ads.txt scanner to find missing or stale lines. Buyers should still crawl the publisher’s file on their own schedule.

Seller records show authorization, not current availability, traffic volume, exclusivity, or quality metrics. Obtain dated inventory data separately.