Check agent readiness
Check how well AI agents (ChatGPT, Claude, Gemini, Perplexity and others) can find, understand and act on a website using the Stunt Double Index, explain the score from real agent sessions, compare against peers, and re-score after fixes.
When to use
- Someone asks how agent-ready, AI-visible or "agent-friendly" a site is, or whether an AI agent could check out, get support or find a product there
- A team wants to know why agents struggle on their site, and what to fix first
- A site has shipped changes meant to help agents (structured data, llms.txt, accessible checkout, fewer bot walls) and needs re-scoring
- You want to benchmark a site against competitors or its sector
Instructions
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Find the site:
search_index_domains(query)with part of the domain or name. If it is not tracked, say so: anyone can add it at index.stuntdouble.io.- If the user works in a Stunt Double project linked to an Index domain, pass
project_idto the tools below instead of a domain.
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Read the report:
get_index_report(domain)returns the overall score out of 100, its band and rank, per-category scores (brand awareness, discovery, information retrieval, market ranking, accuracy, checkout, delegated access, support), per-provider scores, the frictions agents hit and the failing probe checks.- A null score comes with
unscored_reasonandunscored_note(checks blocked or unanswered, or the site opted out). Report that reason instead of a number.
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Explain the weak spots from evidence:
- Pick the lowest categories and providers, then
list_index_sessions(domain, category=…)orprovider=…to read the sessions behind them: what the agent tried, its rubric evidence, a summary and its frictions. - Quote what agents actually ran into. Do not guess at causes the sessions do not show.
- Pick the lowest categories and providers, then
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Compare (optional):
search_index_domains(sector=…)for the sector leaderboard, or query named competitors, thenget_index_reporton the ones worth contrasting.
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Recommend fixes:
- Rank by impact: failing probe checks with high weight first, then frictions that recur across providers, then single-provider issues.
- Tie every recommendation to a failing check or a session friction.
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Re-score after fixes ship:
request_index_rerun(domain)starts fresh probes and about 24 agent sessions. Only the domain's owner can call it (a platform admin, whoever claimed it, or, while unclaimed, someone signed in with a work email on that domain), and a domain can be re-run once every 10 minutes.- Poll
list_index_sessions(domain, run_id)about every 60 seconds until no session is running, thenget_index_report(domain)and report the change per category.
Example flow
search_index_domains(query="acme")
get_index_report(domain="acme.com") # 54/100, checkout 21, support 38
list_index_sessions(domain="acme.com", category="checkout")
search_index_domains(sector="ecommerce", limit=10) # where acme sits among peers
# after the fixes ship
request_index_rerun(domain="acme.com") # returns run_id
list_index_sessions(domain="acme.com", run_id="…") # poll until finished
get_index_report(domain="acme.com") # compare with the earlier scoreExample output
acme.com: 54/100 (rank 212, ecommerce)
Weakest: Checkout 21, Support 38
- Checkout: 5 of 6 providers stalled at the cookie wall before the cart (sessions: claude, openai, gemini…)
- Support: no help content reachable without JavaScript; failing check "support page server-rendered" (weight 3)
Fix first
1. Let the cart load behind the consent banner (affects every provider)
2. Server-render /help and link it from the footer
3. Add Product structured data on PDPs (failing check, weight 2)Tips
- Index data is public. The read tools work on any tracked site, so competitor comparisons need no access.
- Re-runs are expensive. Only re-run after a change has shipped, never to refresh a report that is already current.
- Pair with checklists. Once a fix is chosen,
verify-changecan confirm it on a preview before the re-run, andsetup-guardrailskeeps it from regressing.
Skills
Task skills that teach an agent how to use the Stunt Double MCP server for one job.
Check brand
Audit a product or site against brand and tone-of-voice guidelines: a Stunt Double actor reads every in-scope page like a customer and flags copy, voice, and presentation that break the rules, with evidence.