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StubHubstubhub.com

49/ 100 · Agentic Usability Score
SelectiveScanned 2026-09-22 · local-node · method v0.1Edge: CloudFront
Muse
Meta
?Untested
ChatGPT Agent
OpenAI
✓Allowed
Claude
Anthropic
✓Allowed
Comet
Perplexity
✕Blocked
Grok Bot
xAI
◌Not disallowed
Gemini
Google
✓Allowed
Manus
Manus
◌Not disallowed
Instinct
Spear Street
?Untested

Score breakdown

Five pillars. Task completion is pending until the live task runner ships; the other four are rescaled to 100.
Accessrobots.txt stance + live door test
34/40
Consent & identity pathContent-Signal, published agent policy
0/10
Machine-readable surfacellms.txt, JSON-LD, landmarks, SSR
10/25
Agent protocolsUCP, MCP, A2A, OpenAPI
0/15
Task completionlive agent run: search → cart → checkout
pending

Evidence

Generated by the scanner from this run. Every line is reproducible with the open-source probe.
  • ✕Homepage blocks identified agents: Perplexity-User (HTTP 202); serves ChatGPT-User, Claude-User, GoogleAgent-Mariner
  • ✓robots.txt has no rule against any user-directed agent we test
  • ◐No Content-Signal in robots.txt
  • ◐No llms.txt
  • ✓Homepage carries 2 JSON-LD blocks
  • ◐Missing main/nav landmarks
  • ◐No agent-protocol manifest (UCP, MCP, A2A, OpenAPI)
Identified asHTTPResult
ChatGPT-User200normal page
Claude-User200normal page
Perplexity-User202blocked
GoogleAgent-Mariner200normal page
browser (human)200normal page

What StubHub would need to change

1Give agents a front doorProtocols · up to 12 pts

A Universal Commerce Protocol manifest for shopping, or an MCP server card for everything else. An agent that can call an API never needs to hold a customer's password.

GET /.well-known/ucp
{ "ucp": { "version": "2026-01-23",
  "services": { "dev.ucp.shopping": [{ "transport": "rest", "endpoint": "https://www.stubhub.com/api/ucp/v1" }] },
  "capabilities": { "dev.ucp.shopping.checkout": [ … ] } } }

# or
GET /.well-known/mcp.json
{ "name": "StubHub", "endpoint": "https://www.stubhub.com/mcp", "transport": "streamable-http" }

2Publish llms.txtSurface · up to 8 pts

A short markdown map of what the site does, where the important pages are, and how to search or check out.

/llms.txt
# StubHub
> One paragraph on what this site is for.
- [Products](/products): how to search and filter
- [Checkout](/checkout): steps and constraints

3Use semantic landmarksSurface · up to 5 pts

main, nav, header, footer and labeled forms. Everything an accessibility audit already asks for.

<header>…</header>
<nav aria-label="Primary">…</nav>
<main>…</main>
<form aria-label="Site search"><label for="q">Search</label><input id="q" name="q"></form>

4Say your stance with a Content-SignalConsent · up to 3 pts

Two lines in robots.txt end the guessing game. ai-input covers agents reading pages on a person's behalf.

User-Agent: *
Content-Signal: search=yes, ai-input=yes, ai-train=no
Allow: /