TL;DR: US brand-direct buyers are adopting agentic advertising by starting with mandate-bounded pilot campaigns, focusing on direct publisher relationships, and building internal governance frameworks before scaling agent autonomy.

The Brand-Direct Opportunity

Brand-direct buying has been a growing trend in US programmatic for several years. Brands that historically relied on agencies to manage all media transactions began building in-house trading desks, direct publisher relationships, and proprietary data assets. They wanted more control over where their money went and better visibility into what they were getting for it.

Agentic advertising extends that logic. A buying agent that negotiates directly with publisher-side agents gives brand-direct teams the ability to automate the negotiation work that previously required manual effort, without surrendering the direct relationship or the transparency that motivated the in-house move in the first place.

How Early Adoption Is Taking Shape

US brands that are currently testing agentic advertising are following a broadly similar pattern, regardless of category or scale.

Starting with a contained use case. Rather than deploying agents across the full media mix, early adopters are identifying a specific channel, publisher segment, or deal type where agent negotiation adds clear value. Direct publisher deals for premium inventory are a common starting point, because the negotiation complexity is manageable and the potential for efficiency gain is high.

Building the mandate before deploying the agent. Brand-direct teams are investing time in mandate design before any agent begins operating. This involves translating existing media planning parameters into formal mandate documents: price ranges, approved publishers, content category rules, escalation thresholds. The mandate becomes the operational specification for the agent.

Running parallel workflows. Many brands are running agent negotiations alongside traditional buying processes in the early phases, comparing outcomes rather than replacing the existing workflow immediately. This parallel approach generates the evidence needed to build confidence in agent behaviour and make the case for broader adoption internally.

The Governance Requirement

Brand-direct teams adopting agentic advertising are encountering a new governance requirement that did not exist in traditional programmatic. When a buying agent commits spend on behalf of a brand, that commitment needs to be traceable to an authorised mandate, recorded in an auditable deal log, and reviewable by finance and compliance teams.

This is different from the governance requirements for a DSP campaign, where a human configured the system and approved the budget upfront. In agentic advertising, the agent makes active decisions during the campaign. The governance layer needs to reflect that.

Brands that have existing in-house governance frameworks for media buying tend to find this transition more manageable. The concepts of mandate, authority, and audit already exist in their operating model. They are extending those concepts to cover a new type of agent rather than building governance from scratch.

Direct Publisher Relationships in an Agentic World

One area where brand-direct buyers are finding clear value in agentic advertising is in the management of direct publisher relationships. Maintaining direct deals with a large number of publishers is operationally intensive. Negotiating terms, managing renewals, adjusting volumes, and reconciling delivery all require ongoing attention.

Buying agents can take on much of that operational load. They can manage ongoing negotiations with publisher-side agents, update deal terms as campaign requirements change, and surface anomalies for human review rather than requiring manual monitoring of each relationship.

This makes it practical for brand-direct teams to maintain more direct publisher relationships than they could manage manually. The strategic value of direct access to premium inventory is preserved; the operational cost of managing it is significantly reduced.

Challenges Brand-Direct Teams Are Navigating

Agentic advertising also presents challenges that brand-direct buyers need to manage actively.

Internal alignment is often the first hurdle. Media, legal, finance, and technology teams all have legitimate interests in how agents operate. Getting to a shared mandate that everyone is comfortable with requires cross-functional coordination that takes time.

Technology integration is also a consideration. Brand-direct teams that have built proprietary data and measurement infrastructure need to ensure their buying agents can consume and act on that data appropriately. Mandate design and system integration are closely linked.

Finally, change management within in-house teams is real. People who have built careers around media planning and buying skills need to understand how their roles evolve when agents handle negotiation tasks. The answer is that human expertise shifts toward mandate design, governance, and strategic supplier relationships rather than disappearing.

The Direction of Travel

Brand-direct adoption of agentic advertising is early but accelerating. The teams that are investing in governance frameworks and mandate design now are building the operational capability that will give them a structural advantage as agent-to-agent trading becomes a standard part of the US media market.