MARKAIGEN / TREND ANALYSIS
AAMP 3.0 and OpenProposal: what to review before agentic media buying
AAMP 3.0 puts agent-readable proposals on the advertising agenda. Review identity, commercial terms and approval gates while the specification is in consultation.
Markaigen · · 3 min read
A specification under consultation, not universal adoption
IAB Tech Lab introduced AAMP 3.0 with OpenProposal on 22 September 2026. Public comment runs until 22 October. OpenProposal is intended to structure proposals and the path towards buying commitments for agents. A published specification does not demonstrate that every buyer, seller or ad platform implements compatible production workflows. [1]
The commercial boundary matters more than the chat interface
A system can correctly understand a brief and still agree to the wrong inventory, fee or cancellation term. Distinguish a request for information from a negotiable proposal and a binding commitment. Record the authorised buyer, the seller identity, the currency, the total ceiling and the point at which a person must approve. An agent’s fluent explanation is not a substitute for these fields.
Run a paper exercise before a transaction
Use a fictional campaign and two fictional supplier proposals. Ask whether another person can reconstruct the commercial decision from the record alone. Include a duplicate request, a changed price and an unavailable placement. Define how the workflow recognises a repeated instruction so it does not create a second commitment. Keep the exercise disconnected from live buying accounts; its purpose is to reveal missing controls, not to simulate proven interoperability.
What marketers should ask suppliers now
Ask which specification version is supported, which actions are live, how permissions are enforced and what happens after a failed or repeated request. Request an exportable transaction record and a cancellation procedure. Compare those answers with your campaign approval policy. If a supplier cannot distinguish a draft from a commitment, limit the pilot to planning. Revisit the specification after the consultation rather than treating today’s draft as a permanent contract standard.
Should a marketing team implement AAMP immediately?
Start with supplier questions and a controlled review. Adoption depends on supported systems, commercial needs and tested approval controls, not the announcement alone.
Sources and method
Sources checked on 8 October 2026. Prepared with AI assistance. Proposed workflows are editorial analysis; hypothetical examples are not research findings. Availability may differ by market and account.
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