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The Index · 40 companies · 2026-09-22

Who lets your agent in

Ranked by Agentic Usability Score. One line of evidence per row. Open any row for the full report card.

Grades: A+ ≥93 · A ≥85 · B ≥70 · C ≥55 · D ≥40 · F <40
#CompanyScoreStanceTop evidence
1ChewyRetail · chewy.com74BOpenHomepage serves a normal page to ChatGPT-User, Claude-User, Perplexity-User and GoogleAgent-Mariner
2KayakTravel · kayak.com72BSelectiveHomepage serves a normal page to ChatGPT-User, Claude-User, Perplexity-User and GoogleAgent-Mariner
3StripeDeveloper · stripe.com72BOpenHomepage serves a normal page to ChatGPT-User, Claude-User, Perplexity-User and GoogleAgent-Mariner
4TargetRetail · target.com72BOpenHomepage serves a normal page to ChatGPT-User, Claude-User, Perplexity-User and GoogleAgent-Mariner
5ShopifyCommerce platform · shopify.com70BOpenHomepage serves a normal page to ChatGPT-User, Claude-User, Perplexity-User and GoogleAgent-Mariner
6NeweggRetail · newegg.com69COpenHomepage serves a normal page to ChatGPT-User, Claude-User, Perplexity-User and GoogleAgent-Mariner
7GitHubDeveloper · github.com66COpenHomepage serves a normal page to ChatGPT-User, Claude-User, Perplexity-User and GoogleAgent-Mariner
8AppleTech · apple.com63COpenHomepage serves a normal page to ChatGPT-User, Claude-User, Perplexity-User and GoogleAgent-Mariner
9WalmartRetail · walmart.com63COpenHomepage serves a normal page to ChatGPT-User, Claude-User, Perplexity-User and GoogleAgent-Mariner
10WikipediaReference · en.wikipedia.org63COpenHomepage serves a normal page to ChatGPT-User, Claude-User, Perplexity-User and GoogleAgent-Mariner
11MicrosoftTech · microsoft.com60COpenHomepage serves a normal page to ChatGPT-User, Claude-User, Perplexity-User and GoogleAgent-Mariner
12TicketmasterTickets · ticketmaster.com57CSelectiveHomepage blocks identified agents: Perplexity-User (HTTP 403); serves ChatGPT-User, Claude-User, GoogleAgent-Mariner
13InstacartGrocery & food · instacart.com56CSelectiverobots.txt disallows 18 of 19 user-directed agents via a default Disallow: / for unlisted bots: Claude-User, Perplexity-User, GoogleAgent-Mariner, GoogleAgent-Shopping, Manus-User, MistralAI-User, Devin, Copilot…
14CostcoRetail · costco.com53DOpenHomepage serves a normal page to ChatGPT-User, Claude-User, Perplexity-User and GoogleAgent-Mariner
15GoogleTech · google.com51DOpenHomepage serves a normal page to ChatGPT-User, Claude-User, Perplexity-User and GoogleAgent-Mariner
16StubHubTickets · stubhub.com49DSelectiveHomepage blocks identified agents: Perplexity-User (HTTP 202); serves ChatGPT-User, Claude-User, GoogleAgent-Mariner
17AirbnbTravel · airbnb.com44DSelectiveHomepage blocks identified agents: ChatGPT-User (HTTP 403), Claude-User (HTTP 403), Perplexity-User (HTTP 403); serves GoogleAgent-Mariner
18DeltaTravel · delta.com44DOpenHomepage serves a normal page to ChatGPT-User, Claude-User, Perplexity-User and GoogleAgent-Mariner
19SephoraRetail · sephora.com43DSelectiveHomepage blocks identified agents: ChatGPT-User (HTTP 403), Claude-User (HTTP 403), Perplexity-User (HTTP 403), GoogleAgent-Mariner (HTTP 403)
20NikeRetail · nike.com41DSelectiveHomepage blocks identified agents: ChatGPT-User (HTTP 403), Claude-User (HTTP 403), Perplexity-User (HTTP 403); serves GoogleAgent-Mariner
21LinkedInSocial & media · linkedin.com38FSelectiverobots.txt disallows 19 of 19 user-directed agents via a default Disallow: / for unlisted bots: ChatGPT-User, Claude-User, Perplexity-User, GoogleAgent-Mariner, GoogleAgent-Shopping, Manus-User, MistralAI-User, Devin…
22Best BuyRetail · bestbuy.com36FSelectiveHomepage serves GoogleAgent-Mariner; no response to ChatGPT-User, Claude-User, Perplexity-User
23Uber EatsGrocery & food · ubereats.com36FSelectiveHomepage blocks identified agents: ChatGPT-User (HTTP 403), Claude-User (HTTP 403), Perplexity-User (HTTP 403), GoogleAgent-Mariner (HTTP 403)
24Lowe'sRetail · lowes.com34FSelectiveHomepage blocks identified agents: ChatGPT-User (HTTP 403), Claude-User (HTTP 200), Perplexity-User (HTTP 403), GoogleAgent-Mariner (HTTP 200)
25Booking.comTravel · booking.com28FWalledHomepage returns a bot interstitial (HTTP 202) to every non-browser client, agents included
26DoorDashGrocery & food · doordash.com28FWalledHomepage returns a bot interstitial (HTTP 403, “DoorDash”) to every non-browser client, agents included
27EtsyRetail · etsy.com28FWalledHomepage returns a bot interstitial (HTTP 403, “etsy.com”) to every non-browser client, agents included
28Home DepotRetail · homedepot.com28FWalledHomepage returns a bot interstitial (HTTP 403, “Access Denied”) to every non-browser client, agents included
29KrogerGrocery & food · kroger.com28FWalledHomepage returns a bot interstitial (HTTP 429) to every non-browser client, agents included
30Macy'sRetail · macys.com28FWalledHomepage returns a bot interstitial (HTTP 403, “Access Denied - Macy's”) to every non-browser client, agents included
31UnitedTravel · united.com28FSelectiveIdentified agents got no response within 12 seconds while a browser user-agent got the page; treated as inconclusive
32WayfairRetail · wayfair.com28FWalledHomepage returns a bot interstitial (HTTP 429, “Access to this page has been denied”) to every non-browser client, agents included
33ZillowReal estate · zillow.com28FSelectiveHomepage blocks identified agents: ChatGPT-User (HTTP 403), Claude-User (HTTP 403), Perplexity-User (HTTP 403), GoogleAgent-Mariner (HTTP 403)
34eBayRetail · ebay.com27FWalledHomepage returns a bot interstitial (HTTP 403, “Error Page | eBay”) to every non-browser client, agents included
35ExpediaTravel · expedia.com26FWalledHomepage returns a bot interstitial (HTTP 429, “Bot or Not?”) to every non-browser client, agents included
36Hotels.comTravel · hotels.com26FWalledHomepage returns a bot interstitial (HTTP 429, “Bot or Not?”) to every non-browser client, agents included
37RedditSocial & media · reddit.com26FWalledrobots.txt disallows 19 of 19 user-directed agents via a default Disallow: / for unlisted bots: ChatGPT-User, Claude-User, Perplexity-User, GoogleAgent-Mariner, GoogleAgent-Shopping, Manus-User, MistralAI-User, Devin…
38NY TimesSocial & media · nytimes.com22FWalledrobots.txt disallows 6 of 19 user-directed agents: ChatGPT-User, Claude-User, Perplexity-User, Meta-ExternalFetcher, meta-externalfetcher, DuckAssistBot
39AmazonRetail · amazon.com13FWalledrobots.txt disallows 15 of 19 user-directed agents: ChatGPT-User, Claude-User, Perplexity-User, GoogleAgent-Mariner, GoogleAgent-Shopping, Manus-User, MistralAI-User, Devin…
40OpenTableGrocery & food · opentable.com10FWalledrobots.txt disallows 16 of 19 user-directed agents: GoogleAgent-Mariner, GoogleAgent-Shopping, Manus-User, MistralAI-User, Devin, Copilot, GrokBot, Grok-DeepSearch…