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About

Why measure what agents see?

A meaningful share of the next decade's conversions will be brokered by AI agents acting on behalf of buyers. Where SEO used to decide whether a human found you, an agent now decides whether they can buy from you, compare you, or trust the number you quoted them.

The Stunt Double Index makes that marketplace visible. Real agents (Claude, ChatGPT, Gemini, Perplexity, Copilot and more) work through real tasks on real websites, and every tracked domain gets a public score its owner can read and act on.

Principles

  • Measure behavior, not claims. Every score comes from an observed agent session.
  • Publish everything. Public scores, sector averages, weekly deltas.
  • Respect owners. Verified domain owners can access private evidence and session replays.
  • Reproducible. Any number on the Index traces back to a specific run.

Get involved

Stunt Double runs the Index, and gives you authentic insights into your own product, backed by evidence, at stuntdouble.io. Check your domain to see its score and claim it, or read the methodology to see how we score.