Index Exchange and Prebid Server: the ix adapter, hosting status and managed alternatives

Index's role in Prebid Server is that of a bidder: an exchange that answers the server's requests. Its adapter turns a Prebid Server auction request into a bid request to Index, and returns Index's bids to the auction (Prebid.org, accessed 9 November 2026). Publishers who search for an Index Exchange Prebid Server usually need this adapter, run by whichever host they use.

Index also built a wrapper of its own. Its timeline says it launched "the Wrapper" in 2016 (Index about page). In April 2022 Index wrote that it would "work with our customers in the coming months to help them update to Prebid-powered setups" (Index Exchange, 27 April 2022).

Index also helps run Prebid. Michael McNeeley of Index sits on the Prebid.org board, and Mike Mullin of Index co-chairs the Prebid Mobile committee (Prebid.org board; Prebid.org committees). Its newest product, Index Cloud, entered closed beta in 2026 and lets partners run their own models, data and logic inside the exchange (Index about page). We found no source that describes Index Cloud as a Prebid Server host.

Not publicly, as of 9 November 2026. The table lists what we checked, starting with Prebid.org's list of managed services.

Index documents three ways for Prebid Server to reach it (Index Exchange, 4 May 2026):

1. Web. Prebid.js sends Index to Prebid Server, which calls Index through the server-side adapter. Index also offers a client-side adapter that calls it from the browser.
2. Apps. The Prebid Mobile SDK calls Prebid Server, which calls Index.
3. Streaming TV and other servers. The app, or its server-side ad insertion vendor, sends OpenRTB to Prebid Server, which calls Index.

The host does the configuration. Before you start, Index asks you to get a regional endpoint and a siteId from your Index representative. A self-hosted team adds the ix entry with that endpoint in its Go or Java configuration; a managed host does the same on your behalf (Prebid.org). How adapters are built and switched on is covered in Prebid Server bidder adapters.

One trade-off is stated by Index itself. Calling Index from the browser "tends to have a better cookie match rate" than calling it through Prebid Server (Index Exchange). Moving Index server-side saves browser work but may lower matched users, so test both.

There is no hosting price to report, because we found no hosting product. Index does not publish its exchange fee on the pages we read. If Index demand reaches you through a managed host, the host's own fee applies on top of whatever Index's seller agreement sets.

Strengths

• Broad adapter features. The Prebid Server adapter supports deals, floors, first-party data and the SupplyChain object (Prebid.org).
• Works with any host. Microsoft lists ix among its Prebid Server Premium partners (Microsoft Learn, 2 November 2026), and the same adapter runs on a self-hosted server.
• Standards work. Index says it co-authored the OpenRTB specifications and OpenRTB 2.6 (Index about page).

Limits

• No hosted option. If you want one vendor to host the server and supply demand, Index is not that vendor on current evidence.
• Set-up needs a representative. Endpoints and site IDs come from Index staff, not from public documentation (Prebid.org).
• Some privacy fields unconfirmed. The bidder page lists GPP and DSA support as "check with bidder" (Prebid.org).

• Any hosted Prebid Server from Index Exchange: product name, launch date, status, deployment model, price or customers. None was found in the sources checked on 9 November 2026.
• Whether Index Cloud, in closed beta in 2026, will run Prebid Server for partners or publishers.
• Index's exchange fees.
• Index's GPP and DSA handling in the Prebid Server adapter.

1. Index Exchange, "Integrate with Index using Prebid Server" (last updated 4 May 2026). https://kb.indexexchange.com/publishers/prebid_integration/integrate_with_ix_using_prebid_server.htm
2. Index Exchange, "Integrating with Index using Prebid" (accessed 9 November 2026). https://kb.indexexchange.com/publishers/prebid_integration/integrating_with_ix_using_prebid.htm
3. Prebid.org, "Index Exchange (Prebid Server)" bidder documentation (accessed 9 November 2026). https://docs.prebid.org/dev-docs/bidders/ix-server.html
4. Prebid.org, Managed Services (accessed 9 November 2026). https://prebid.org/managed-services/
5. Index Exchange, "About" (accessed 9 November 2026). https://www.indexexchange.com/about/
6. Index Exchange, "Contact" (accessed 9 November 2026). https://www.indexexchange.com/contact/
7. Index Exchange, Privacy Centre (accessed 9 November 2026). https://www.indexexchange.com/privacy/
8. Index Exchange, "Technology Choices Will Make Programmatic Advertising Easier and More Profitable for Content Creators" (27 April 2022). https://www.indexexchange.com/2022/04/27/technology-choices-header-bidding-manager/
9. Index Exchange, "Prebid" partner page (7 July 2026). https://www.indexexchange.com/partners/prebid/
10. Prebid.org, Board of Directors and Project Management Committees (accessed 9 November 2026). https://prebid.org/board-of-directors-2/ and https://prebid.org/project-management-committees/