A tamper-proof signature on every message an agent sends. When a request says "book $200K on this deal," the seller needs to know it came from your agent and that nobody changed the number in transit. With agents trading with agents at speed, this is not optional security hygiene. It is table stakes.
Ad tech glossary
Request Signing
Technical definition
The practice of cryptographically signing an API request so the receiver can verify who sent it and detect whether it was altered in transit.
The ADLINGO translation
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Related terms
- A2A (Agent2Agent Protocol)
- AAMP (Agentic Advertising Management Protocols)
- adagents.json
- AdCP (Ad Context Protocol)
- Agent Manifest
- Agentic Advertising
- Agentic Audiences
- Agentic Commerce
- Agentic Commerce Protocol (ACP)
- Agentic Marketplace
- AgenticAdvertising.org
- Answer-Based Ads
Where this shows up
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I'm clocking two kinds of advertising executives right now: Ones who treat AI like a procurement decision, and the ones treating it like a leadership test. One buys tools. The other builds teams that know how to use them.
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The RFP Oracle
The ad tech sales season is wrapping up for 2026. AI dominated everything the market responded to this year, and it was the most predictable trend ever. All we had to do was pay attention to what the agencies were asking.