OverviewAndroidiOSUnityReact NativeFlutter (BETA)CLIAPIMCPDemandAd FormatsDashboardChangelog

Start.io (BETA)

Use this guide to enable Start.io bidding in CloudX.

Keep using the platform integration guides for CloudX SDK installation and ad loading:

Start.io is a server-side bidder: CloudX requests bids on the server and renders winning creatives with the CloudX SDK’s built-in renderer. There is no Start.io SDK or adapter to add to your app.

Overview

Use the following values:

  • Start.io Publisher ID on the Start.io page under Bidders; this account-level value applies to all applications
  • CloudX app_key and CloudX ad unit identifiers in app code

There are no Start.io app IDs or placement IDs to map in CloudX. After onboarding, enabling the bidder, entering the Publisher ID, and adding line items is the entire CloudX setup.

Supported ad formats:

  • Banner (320x50)
  • MREC (300x250)
  • Interstitial
  • Rewarded

Native is not supported yet.

Step 1. Complete Start.io onboarding and update app-ads.txt

Contact your Start.io account manager before enabling live traffic. If you do not have a Start.io contact, ask your CloudX account manager to coordinate the onboarding.

Provide Start.io with the apps you plan to enable:

  • Android package names, such as com.example.app
  • Numeric App Store IDs for iOS apps, such as 6448392061

Start.io will provide the current app-ads.txt lines for your publisher account. These lines are publisher-specific because the Start.io direct entry contains your unique publisher ID. Use that same Publisher ID in CloudX.

Publish the supplied lines at https://yourdomain.com/app-ads.txt, where yourdomain.com is the developer website listed in the App Store or Google Play. Keep the existing entries for CloudX and other networks.

Step 2. Enable Start.io in CloudX and add the Publisher ID

Go to Bidders in the dashboard navigation, select Start.io in the bidder list, and click Enable.

On the same Start.io page enter the Start.io Publisher ID supplied during onboarding. This value is required and applies to every app in the CloudX account. There is nothing to configure at the ad-unit level.

Start.io Publisher ID in the Bidders section

If Start.io is disabled or the Publisher ID is missing, CloudX will not request Start.io bids for your inventory.

Step 3. Add Start.io line items

Go to Line Items and create line items for bidder Start.io on each CloudX ad unit where Start.io should compete.

Start.io selected on a CloudX line item

  • Use bidder Start.io
  • Target Banner, MREC, Interstitial, or Rewarded ad units
  • Repeat the setup for each ad unit where Start.io should bid

Step 4. Test and validate

Start.io does not provide a formal RTB test mode. Use controlled live traffic after Start.io confirms your Publisher ID and app-ads.txt setup.

  1. Add your device as a CloudX test device so you can inspect CloudX behavior during validation.
  2. Build and run the app with the CloudX app_key and the correct CloudX ad unit identifiers.
  3. Request ads from each Banner, MREC, Interstitial, and Rewarded ad unit where Start.io is enabled.
  4. Confirm that Start.io participates or wins where expected and that returned ads render correctly.
  5. Compare impressions and revenue with Start.io after traffic begins flowing.

CloudX test-device configuration helps you validate your integration, but it does not make Start.io return test ads. No fill during a small test can be normal and does not by itself indicate that the setup is broken.

Troubleshooting

Start.io is not listed

Start.io is currently beta in CloudX. Contact your CloudX account manager to request access if it is not visible in the Bidders section.

Start.io is not bidding

Check the following first:

  • Start.io is enabled in the Bidders section
  • The required account-level Start.io Publisher ID is present
  • A Start.io line item exists for the ad unit
  • The ad unit is Banner, MREC, Interstitial, or Rewarded (Native is not supported)
  • Start.io has provided and confirmed the current app-ads.txt lines for your publisher account
  • The app store listing points to the developer domain hosting the updated app-ads.txt file

Start.io bids but the ad does not render

Check the following:

  • Your app is using the CloudX app_key and loading the intended CloudX ad unit
  • Your app is on a current CloudX SDK version
  • The ad unit is configured as Banner, MREC, Interstitial, or Rewarded

Start.io creatives render through the CloudX SDK’s built-in renderer. If a specific creative fails consistently, contact CloudX support with the app, ad unit, and approximate time of the failure.

Demand is lower than expected

  • Confirm with Start.io that your Publisher ID is correct and that your app-ads.txt file contains the latest publisher-specific entries.
  • Allow time for Start.io and its buyers to re-crawl the updated file.
  • Validate with controlled live volume because Start.io does not provide RTB test demand.