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A2: Your first media buy

Free module — No account required. ~20 minutes with Addie. Prerequisite: A1.

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Learning objectives

  • Execute the full media buy lifecycle: discovery, purchase, creative sync, delivery
  • Identify the agent roles involved: buyer agent, sales agent, creative agent, signals agent
  • Read and understand real protocol messages at each stage
  • Observe a live agent-to-agent transaction

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Reading list

Protocol architecture

The complete architecture: domain map, identity layer, transaction domains, governance, and ecosystem layers.

MCP integration guide

How MCP works in practice: tool calls, response format, context management, async operations.

Capability discovery

How agents advertise their capabilities so other agents can discover what they offer.

AdAgents.json

The agent discovery mechanism — like robots.txt for advertising agents.

A2A guide

The Agent-to-Agent protocol — how specialized agents collaborate on complex campaigns.

Task lifecycle

How tasks move through states: from request to completion, including async operations.

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Key terms

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What you’ll do with Addie

Tell Addie what you want: audience, goals, budget. Then walk through each step as it happens:
  1. Discovery — get_products against @cptestagent, examine real response structure
  2. Purchase — create_media_buy with targeting and budget
  3. Creative — sync_creatives to deliver assets to the publisher
  4. Delivery — get_media_buy_delivery to see results
You’ll see the actual protocol messages at each stage. By the end, you’ve bought media through an agent.

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Assessment

Passing threshold: 70%.

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Start this module

Start A2 with Addie

Open Addie and say “I’d like to start certification module A2.”
Next: A3: The AdCP landscape