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The week everyone tried to own the agent layer
No fresh agency-vs-DSP fight. No earnings shocker, exactly. But pull this week’s stories together and you can see something specific happening: every layer of the stack made an agentic move inside five days.
Omnicom is gunning for the adtech middlemen. Yahoo and Kochava formalised a workflow that treats the DSP as a backend service rather than the front door. Meta opened its ad ecosystem to third-party AI tools. And on Thursday, OpenAI confirmed ChatGPT ads are landing in the UK in the next few weeks.
If you sit on the demand side of B2B media, this is the week to stop reading “agentic” as a slide deck term and start treating it as a budget reallocation question.
The orchestration and planning layer — the thing that decides which DSP, which inventory, which audience, which creative, against which signal — is where the next decade of margin sits. Everyone in this week’s news flow is racing to own it.
There is also a quieter story running underneath: a protocol layer is being built in real-time across the industry. Omnicom is using AdCP. Meta is opening through MCP. Yahoo and Kochava are connecting via MCP. The IAB Tech Lab has named the umbrella standard AAMP. The plumbing is being agreed in front of our eyes, and the timeline for “this gets settled” is months, not years.
Four stories that actually move the road in front of you.
1. OpenAI’s ChatGPT ads land in the UK
The story. On 7 May, OpenAI confirmed it would start testing ChatGPT ads in the UK, Brazil, Japan, South Korea and Mexico over the next few weeks (Digiday, Reuters). Earlier in the week, the self-serve ads manager opened to US advertisers of all sizes — restricted categories aside — and OpenAI promised third-party measurement and CPA bidding to address the “is this actually working” question (Digiday, AdExchanger). The ad business is reportedly tracking around $100M annualised after roughly three months live, against a $2.5B 2026 internal target and $100B by 2030 (Axios). For UK context, Black Lab Digital’s analysis last week is one of the better practitioner reads on what UK marketers should be doing now.
My take. Two weeks ago this was a US story with directional UK relevance. Now it is a UK media plan question. Most British B2B marketers I speak to are still treating ChatGPT as a dark funnel they cannot see into. From later this month, that funnel has paid placements in it, in your buyers’ language, with self-serve access and CPA bidding.
The “we will revisit it once it scales” position is now actively expensive — both because your competitors are training the relevance model against your category, and because ChatGPT’s CPC range ($3 to $5 in early reporting) sits materially below LinkedIn for comparable B2B intent. I’d argue it’s at BARGAIN levels right now and it won’t last because it doesn’t direct many clicks, so competition is going to heat up fast.
The bigger structural point: OpenAI just turned its first market expansion into a measurement story rather than a reach story. That is the right move for an ad platform that wants budget rather than experimentation spend. The programmatic testing, which started at an expensive but should-be-defensible $60 CPM, crashed to $25 CPM, and then dissolved into self-service CPC. The testing is a $100m ad business car crash which will win despite the best efforts of those paid to make it fly.
As we were talking about on LinkedIn this week, there is a split growing between Google AI (direct response) and ChatGPT (brand) and where they see the main leaning in this tech.
Programmatic display and CPM bidding backed up brand. CPC into CPA backs up performance/DR.
It baffles me that they are so confused around what they are selling. For me, in B2B, this meets every tickbox for brand advertising — see LinkedIn post below.
OpenAI ChatGPT ads in the UK
Digiday, Krystal Scanlon, ‘Expand thoughtfully’: OpenAI offers ChatGPT ads to new markets including the U.K., Brazil and Japan, 7 May 2026 — link
Digiday, OpenAI opens up ChatGPT ads manager to the U.S. while promising third-party measurement, CPA bidding, May 2026
AdExchanger, POSSIBLE 2026: OpenAI announces CAPI and self-serve ads manager launch, May 2026 — link
Reuters Institute for the Study of Journalism, Felix Simon, Advertising was always going to come for AI chatbots. The real question is how — link
Black Lab Digital, James Starkey, ChatGPT Ads Are Coming to the UK: What Brands Need to Know Now, 6 May 2026 — link
Axios, OpenAI projecting $100bn in advertising revenue by 2030, April 2026
2. Omnicom is testing AI agents to cut out the adtech middlemen
The story. On Omnicom’s Q1 2026 earnings call (28 April), CTO Paolo Yuvienco confirmed the holdco has already executed live agent-to-agent media buys for several clients, using AdCP — the Ad Context Protocol, an open standard that lets AI agents discover inventory, transact, build creative and manage accounts directly with publishers (AdExchanger, Digiday, ExchangeWire, BestMediaInfo). CEO John Wren framed adtech intermediaries as extracting a “toll” paid by clients, and said shortening the path to publishers is now a strategic priority.
The under-reported half of the story: Omnicom is plugging Acxiom — acquired as part of the IPG deal — directly into Omni, the holdco’s AI sales and marketing platform, to build unified customer IDs that feed the agents (AdExchanger). Wren told investors his 2018 decision to walk away from buying Acxiom for $2bn was vindicated; seven years later, he’s bought all of IPG (including Acxiom) for $9bn and the data layer is now the engine for agentic buying.
My take. This is the most consequential story of the week, and it is being read too narrowly.
The headline is “Omnicom builds agents,” and that is the definition of “meh, so what.”
The actual story is: the world’s largest media holdco has decided that the right operational unit for the next era is “holdco plus agent plus first-party data spine” — not “holdco plus DSP plus SSP plus verification plus identity plus ABM platform plus attribution.” Each of those middle-layer point solutions becomes optional — useful where the agent decides it is useful, replaceable where it isn’t.
The DSP market is now getting plundered by SSPs bringing a media + curation + [increasingly an] activation layer — see Index Exchange and Bedrock Platform, who shipped the world’s first containerised DSP bidder running inside the exchange itself on 21 April (AdWeek, ExchangeWire, Index Exchange, Bedrock). This is supply chain compression at its finest.
Now the source of the majority of ad spend, big holding co agency groups, are seeking to use protocol-level tech (AdCP, MCP) to bypass the old world line up of adtech full stop. This is the compression from the cheque book side of the market, and goes even further.
For B2B, this is going to land harder than it does for B2C, and faster. B2B media plans already lean on a super fragmented stack — DSPs, identity vendors, intent providers which are irrelevant in B2C, ABM platforms to score, verification, attribution. Most of that stack exists because no single platform handles the buying-committee-and-intent layer cleanly. Keep your eyes peeled, because we are building something at FunnelFuel which will compact this whole stack and fix this issue — an advertising OS for B2B which upgrades the existing best infrastructure to work for B2B.
An agentic orchestrator that can stitch firmographic, intent and engagement signals across that fragmented set is, structurally, what every ABM tool has been pitching for ten years and never quite delivered. If Omnicom builds it credibly, the rest of the holdcos follow within twelve months, and the independent middle layer has eighteen months to prove it is not worth bypassing.
The B2B implication: if you are running a 2026 stack review, the question is not “which DSP” or “which ABM platform” — it is “which of these tools survive a holdco putting an agent in front of them, and which become commodity execution pipes.”
Omnicom + AdCP + Acxiom
AdExchanger, Omnicom Has An AI-Powered Plan To Cut Out Ad Tech Middlemen, 30 April 2026 — link
Digiday, ‘That is an objective’: Omnicom tests AI agents to cut out the ad tech middlemen, late April 2026 — link
ExchangeWire, Digest: Omnicom Tests AI Agent Media Buying, 30 April 2026 — link
BestMediaInfo, Omnicom says it has executed real client media buys using agent-to-agent AI framework — link
AdExchanger, Media In 2026: From Managed Decline To Ruthless Independence (analyst context on holdco agentic strategy) — link
3. Yahoo + Kochava put a name on the new shape: the Unified Ad Platform
The story. On 5 May, Yahoo and Kochava announced a partnership embedding a Yahoo DSP workspace inside Kochava’s StationOne platform — pitching agentic workflows that operate across multiple DSPs from a single orchestration layer (Digiday, AdExchanger, GlobeNewswire). The technical detail matters: the Yahoo workspace ships pre-defined Skills, Agents, and an MCP Connection between StationOne and Yahoo DSP. Kochava CEO Charles Manning compared StationOne to Slack — “instead of connecting people on your team, the way that Slack does, StationOne connects all the tools that ad ops, media buying teams, or traders use.” On 8 May, Digiday published a “WTF is a unified ad platform” explainer formalising the term coined by W Media Research’s Karsten Weide. Yahoo’s framing is telling: the DSP becomes the “system of record” for performance and brand safety, but campaign logic moves up into the orchestration layer.
My take. The terminology matters because it is the first time the industry has named what has been quietly happening for two years — DSPs and SSPs converging, point solutions getting absorbed, the stack reorganising around fewer, broader players. This is the reality of a long-awaited and long-overdue cleansing of an adtech supply chain which got too caught in its ways for too long, and supported bloated re-selling and arbitrage long past an acceptable end date for a new technology ecosystem. “Unified Advertising Platform” is the box every vendor will now spend 2026 trying to fit themselves into.
Read together with the Omnicom story, this is the same shift seen from two angles. The holdcos want to own the orchestration layer with their own agents. The independent adtech sector wants to own it by merging the middle into a unified product. Whoever wins, the standalone DSP and standalone SSP both lose narrative gravity. They become components, not categories.
For B2B buyers, the pragmatic question is supplier risk. Most B2B media plans are running through partners who built their value proposition in the OpenRTB era — quality of audience, breadth of supply, attribution layer, data layer. Those propositions still hold operationally. They are just losing the narrative to the unified orchestration story. That gap between operational reality and narrative direction is where bad procurement decisions get made over the next twelve months. Don’t let your stack be reorganised by a slide deck before the underlying products have actually changed.
Right now, the reality is that the agentic landscape and the Omnicom way would be stuck trying to navigate and procure messy, small, B2B first party data. B2B data changes over faster than B2C, whether it’s the work email linked to the job that you change every 1–3 years; titles, locations, and everything that goes with it — versus B2C data which remains intact longer. Personal emails that last on average 5x longer than work ones, age ranges, genders, income bands, and the underlying foundations of consumer marketing are significantly more static. Don’t expect agents to be able to locate and find inventory packages for B2B easily. But equally, back AI to find the answers faster than we expect it to.
Yahoo + Kochava + StationOne (the Unified Ad Platform thesis)
Digiday, Ronan Shields, Ad Tech Briefing: Yahoo pairs with Kochava to pitch ‘agentic’ DSP workflows, 5 May 2026 — link
AdExchanger, AI Creates More Ad Tech Frenemies (Yahoo/Kochava alliance context), 6 May 2026 — link
GlobeNewswire (Kochava press release), Kochava Announces New Yahoo DSP Workspace Now Available on StationOne, 5 May 2026 — link
Digiday, WTF is a unified ad platform?, 8 May 2026 — link
W Media Research, Karsten Weide — original UAP framing
Bedrock + Index Cloud (containerised DSP / supply-chain compression)
AdWeek, Index Exchange Welcomes DSPs into New Cloud Infra, Bringing Bidders Closer to Ad Inventory, 21 April 2026 — link
ExchangeWire, Bedrock Debuts Containerised DSP Deployment on Index Cloud, 24 April 2026 — link
Index Exchange press release, Introducing Index Cloud, 21 April 2026 — link
Bedrock Platform, Bedrock Platform Launches the First Containerized DSP in Index Cloud — link
PPC Land, Bedrock becomes first DSP to run its bidder inside an exchange — link
Below are the rest of the week’s stories, and what I’d change in a B2B media plan because of them.