Last updated: 13 October 2026

Programmatic advertising is not about to be replaced. The auction will keep clearing most open-web impressions because nothing else matches its speed at that scale. What is changing is the layer above the auction: more deals are being negotiated by software agents rather than won in auctions, and that exposes a gap programmatic never closed, a shared record of what buyer and seller actually agreed.

TL;DR. The future of programmatic is two transaction types running side by side: auctions for scale, and agent-negotiated deals for direct, premium and non-programmatic inventory. Open frameworks for agent trading now exist: IAB Tech Lab's AAMP, announced in early 2026, and AdCP from AgenticAdvertising.org, under which the first agent-to-agent media buy ran in October 2025. Agent capability is no longer the constraint. The pace of change depends on deal governance: whether both parties can verify the agreed terms, and who is accountable when delivery and agreement do not match.

What problems has programmatic never solved?

Programmatic solved reach and efficiency. It did not solve accountability for where the money goes. The ISBA and PwC Programmatic Supply Chain Transparency Study, published in May 2020, traced UK advertiser spend through the supply chain and found that publishers received 51% of it. Around 15% of spend could not be attributed to any party at all, the gap the study called the "unknown delta".

The follow-up study, published by ISBA and PwC in January 2023, showed what happens when data is shared. The ad impression match rate rose to 58% from 12% in 2020, and the unknown delta fell to 3%. ISBA cautioned that both studies covered the premium end of the market and should not be read as representative of the wider ecosystem.

Fee opacity, measurement fragmentation and brand safety failures share a root cause: no single record of the transaction is visible to both sides. The DSP holds the buyer's data, the SSP holds the seller's, the exchange holds the auction log, and reconciling them is a manual exercise most buyers have learned to tolerate rather than fix.

How do AI agents change the way programmatic deals are made?

In an auction, the price is won. In an agent-negotiated deal, the price is agreed. A buy-side agent proposes terms, a sell-side agent accepts, counters or declines, and both converge on a deal. That is a different transaction type, not a faster auction.

The change matters because an agreed deal can be recorded at the moment of agreement, in a form both parties hold. For the first time, a buyer can in principle compare what was agreed against what was delivered using a record neither side could alter in between. In conventional programmatic, that comparison has been hard or impossible because no such shared record existed.

Agents also widen what can be bought this way. IAB Tech Lab's OpenProposal specification, part of AAMP, standardises how publishers define advertising products and packages and present them in RFP responses. That brings packaged and direct deals, not only single auction impressions, within reach of a buyer agent. AdCP is built with the same reach in mind: its documentation describes a protocol for direct deals, sponsorships, broadcast and out-of-home as well as programmatic exchange.

What stays the same in programmatic?

The open auction stays. Bilateral negotiation cannot price every impression on the open web in milliseconds, and the auction will continue to clear the long tail of inventory for the foreseeable future. Agent-negotiated deals add a channel alongside it rather than replacing it.

Measurement stays, and becomes more important. Viewability, invalid traffic and brand safety measurement describe what was delivered, and they sit downstream of how the deal was struck. When agents transact at volume, human review of delivery stops being practical, so independent verification carries more weight, not less.

Ad serving stays. Agents negotiate and commit deals, but delivering a creative to a placement still needs serving infrastructure. Targeting will keep evolving on its own track, driven by privacy regulation and first-party data rather than by agents.

What has to be true for agent-to-agent trading to scale?

Three conditions decide the pace, and they are at different stages.

Agent capability is largely in place. Agents can read a brief, evaluate inventory against constraints and negotiate price within set limits, IAB Tech Lab publishes open reference buyer and seller agents, and live agent-to-agent buys have already run using AdCP.

Shared deal governance is partly in place. AAMP and AdCP now define how agents communicate, discover each other and exchange proposals. What is less settled is the commercial record: the single agreed statement of terms that settlement, makegoods and disputes depend on. The AdCP documentation is explicit that payments, legal agreements, settlement, disputes, credits and makegoods remain account or platform integrations unless a specific AdCP contract covers them. Until the agreed terms sit in a record both parties can query, two agents that disagree about a deal have no neutral way to settle it.

Contractual accountability is least developed. An agent is not a legal entity, so its principal is answerable for its commitments, but contracts, insurance and indemnities written for agent-made commitments are still immature.

How quickly will programmatic change?

Slower than the announcements suggest. Programmatic standards have historically taken years to spread: ads.txt, introduced by IAB Tech Lab in 2017, took years to reach broad adoption, and sellers.json followed in 2019. Viewability moved from a differentiator to a standard contract term over the second half of the 2010s, after the Media Rating Council issued its viewable impression guidelines in 2014.

The realistic picture is a split market. A growing share of premium and direct spend moves through agent-negotiated channels where the deal record infrastructure exists, while open-exchange and managed-service buying continue. Shared deal records are likely to follow the viewability path: an optional extra first, then a baseline buyers expect in every contract.

How should buyers prepare now?

Buyers can prepare without betting on any single protocol by answering three governance questions before deploying an agent. Which decisions will an agent make alone, and which need a person? What deal record will be required from any marketplace or seller, and will both parties hold the same copy? How will agent performance be judged when an agent is making decisions a trader used to make?

These are not technology questions. They are governance questions, and they are cheaper to answer before the first disputed deal than after it. Alkimi, an agentic advertising marketplace, addresses the second question directly: buy-side and sell-side agents negotiate on a shared DealSheet that both parties own, with human approval at the deal level.

Frequently asked questions

Will AI agents replace programmatic advertising?

No. The open auction will keep clearing most open-web impressions. Agent-negotiated deals add a second transaction type, used mainly for direct, premium and non-programmatic inventory.

What is the biggest change AI brings to programmatic?

The shift from prices won in an auction to prices agreed in a negotiation, which makes it possible to record the agreed terms in a form both buyer and seller hold.

How much of programmatic spend reaches publishers?

The ISBA and PwC study published in May 2020 found that publishers received 51% of UK advertiser spend, with around 15% unattributable to any party. The follow-up study published in January 2023 found the unattributable share had fallen to 3% among the premium advertisers and vendors studied.

What standards exist for agent-to-agent advertising?

Two main frameworks: AAMP, IAB Tech Lab's Agentic Advertising Management Protocols, announced in early 2026, and AdCP, the Ad Context Protocol published by AgenticAdvertising.org. They come from different bodies and are developing in parallel.

What should advertisers do now to prepare?

Decide which decisions agents may take alone, require a deal record both parties can verify, and set out how agent performance will be measured before any agent spends money.

What Is the Future of Programmatic Advertising?