Top fixes
- Structured data (+2 points): add a JSON-LD block (Organization or WebSite, plus Product, FAQPage or Article where relevant); add og:title and og:description so answer engines describe you accurately. How to fix
- MCP census entry (+1 point): Publish /.well-known/x402 with your paid routes so payment indexers can list you. How to fix
Ordered by points recoverable. Each area: 2/2 pass, 1/2 warn, 0/2 fail.
x402engine.app is graded C. The $49 AI Visibility Full Report turns the failing check above (structured data) into a prioritized, specific fix list for x402engine.app, and tests 8 real buyer questions across ChatGPT-class models to show what AI answers say about you today.
Get the full report — $49 Stripe checkout asks for your brand name and category; the report is ready about 60 seconds after payment. Legal notices and the MCP census entry are not in this report (free: Compliance Desk check, census claim).
Crawler access (robots.txt)
2/2 · pass
8 of 8 AI crawlers may read the site, 0 disallowed
- GET /robots.txt -> HTTP 200, 67 B, 1 user-agent group
- Allowed: GPTBot (via *), ClaudeBot (via *), OAI-SearchBot (via *), PerplexityBot (via *), Google-Extended (via *), Amazonbot (via *), CCBot (via *), Bytespider (via *)
- Sitemap declared: https://x402engine.app/sitemap.xml
Fix: Nothing to fix here.
Machine-readable surfaces
2/2 · pass
5 of 7 surfaces present (/llms.txt, /sitemap.xml, /.well-known/x402, /.well-known/agent-card.json, /openapi.json)
- /llms.txt: HTTP 200, 13 KB of text
- /sitemap.xml: HTTP 200, XML sitemap (510 B)
- /.well-known/x402: HTTP 200, JSON larger than 256 KB (not validated)
- /.well-known/agent-card.json: HTTP 200, valid JSON (agent "x402engine")
- /.well-known/mcp-registry-auth: HTTP 404
- /openapi.json: HTTP 200, JSON larger than 256 KB (not validated)
- /ai.txt: HTTP 404
Fix: Nothing to fix here.
Readable without JavaScript
2/2 · pass
Home page is readable
- GET https://x402engine.app/ -> HTTP 200, text/html, 119 KB
- 21,545 characters of visible text with scripts, styles and tags removed; <title>: "x402engine — Pay-per-call APIs for AI Agents"
- 1 external script, 1 inline; <noscript> absent
- first words: "⚡ x402engine What is this Use cases Services How it works Skill Docs Docs 113 API routes — 77 LLM routes Pay-per-call APIs for AI agents No ..."
Fix: Nothing to fix here.
Structured data
0/2 · fail
No JSON-LD, Open Graph incomplete
- 0 JSON-LD blocks
- Open Graph: no og:title; no og:description
- meta description: present
Fix: add a JSON-LD block (Organization or WebSite, plus Product, FAQPage or Article where relevant); add og:title and og:description so answer engines describe you accurately.
Legal notices (TAKE IT DOWN desk check)
not measured
Unavailable
- takeitdown.agentexchange.work/check.json: refused takeitdown.agentexchange.work: hosts on agentexchange.work cannot be graded from inside the same Cloudflare zone; every check would - unavailable
Fix: Re-run in a few minutes; the notice check could not be completed.
MCP census entry (index.agentexchange.work)
1/2 · warn
Exposes /mcp but is not in the census
- census unavailable (refused index.agentexchange.work: hosts on agentexchange.work cannot be graded from inside the same Cloudflare zone; every check would time )
- GET /mcp -> HTTP 200 (application/json): an endpoint answers
- Index MCP probe record: refused index.agentexchange.work: hosts on agentexchange.work cannot be graded from inside the same Cloudflare zone; every check would time
Fix: Publish /.well-known/x402 with your paid routes so payment indexers can list you.
$49 AI Visibility Full Report
This grade is free and automated. The paid next step is the $49 AI Visibility Full Report (which brands a representative AI model, standing in for ChatGPT-class assistants, names when buyers ask about your category, with a prioritized fix list) from aivisibility.agentexchange.work, run for x402engine.app. It includes:
- 8 real buyer questions tested across ChatGPT-class models
- Competitor share-of-voice: who AI names, how often, versus you
- Full GEO site audit with prioritized, specific fixes
- Agent-Readiness Score: crawler access, llms.txt, schema, discovery manifest
- Custom 30/60/90-day action plan to get cited by ChatGPT, Perplexity and Google AI Overviews
- Shareable report, generated in about 60 seconds after checkout
Get the Full Report — $49 Stripe checkout asks for your brand name and category; the report is ready about 60 seconds after payment. Legal notices and the MCP census entry are not in this report (free: Compliance Desk check, census claim).
