Home / AI Readiness Audits / x402 Protocol (x402.org)
x402 Protocol (x402.org): AI Search Readiness
Sector: Crypto & Web3 · Category: HTTP 402 Agent Payment Standard · Cohort Rank: #25 of 40 · Score: 61/100 (Grade C+)
x402 Protocol (x402.org) scores 61/100 (Grade C+), ranking #25 of 40 unblocked developer platforms audited on UTC (-2.1 pts vs the 63.1/100 cohort mean). From Cloudflare’s edge, https://x402.org/ responded in 45ms TTFB with 88 KB HTML across 40 <script> tags, emits zero Schema.org application/ld+json blocks on the root HTML document, and permits 16/29 AI crawlers while blocking 13 (GPTBot, ClaudeBot, anthropic-ai, claude-web, Google-Extended, Google-CloudVertexBot…). At the discovery layer, x402.org currently serves /llms.txt (HTTP 200), and returns non-200 on /llms-full.txt (HTTP 404), /pricing.md (HTTP 404), /.well-known/mcp.json (HTTP 404), /.well-known/openapi.json (HTTP 404).
Scope & limits: Technical readiness assessment from Cloudflare edge probes on 2026-11-14 UTC; independent audit not affiliated with x402 Protocol. Technical readiness does not guarantee AI citations or sales.
1. Technical Signal Telemetry & Discovery Status
| Signal / Endpoint | Observed Result | Standard Reference |
|---|---|---|
| Root Edge Response | 45ms TTFB · 88 KB HTML · 40 <script> tags | Cloudflare Edge Node (NRT) |
GET /robots.txt | HTTP 200 · 16/29 AI bots allowed | RFC 9309 crawler access policy |
GET /sitemap.xml | HTTP 200 · Declared: https://x402.org/wp-sitemap.xml | Canonical URL discovery index |
GET /llms.txt | HTTP 200 | Markdown index for ChatGPT Search, Perplexity & Claude |
GET /llms-full.txt | HTTP 404 | Single-file plain-text RAG documentation corpus |
GET /pricing.md | HTTP 404 | Deterministic tier & fee schedule |
GET /.well-known/ai.txt | HTTP 404 | Machine discovery pointer manifest |
GET /ai/summary.json | HTTP 404 | Structured JSON entity & capability profile |
GET /.well-known/mcp.json | HTTP 404 | Model Context Protocol server discovery |
GET /.well-known/agent-card.json | HTTP 404 | Agent-to-Agent (A2A v0.2.5) capability card |
GET /.well-known/openapi.json | HTTP 404 | OpenAPI 3.1 function-calling contract |
Schema.org JSON-LD | 0 detected · No application/ld+json on / | Entity disambiguation & structured offers |
2. 29-Crawler /robots.txt Access Breakdown
| Policy Bucket | Count | Measured User-Agents |
|---|---|---|
| Explicitly Allowed | 0/29 | None explicitly named (uses wildcard) |
Allowed via Wildcard (*) |
16/29 | OAI-SearchBot, ChatGPT-User, Claude-SearchBot, Claude-User, PerplexityBot, Perplexity-User, Googlebot, Bingbot, Applebot, DuckAssistBot, Meta-ExternalFetcher, facebookexternalhit, AI2Bot, AI2Bot-Dolma, xAI-Bot, YouBot |
Disallowed (Disallow: /) |
13/29 | GPTBot, ClaudeBot, anthropic-ai, claude-web, Google-Extended, Google-CloudVertexBot, Applebot-Extended, cohere-ai, Bytespider, meta-externalagent, Amazonbot, PetalBot, CCBot |
3. Missing-Artifact Diffs & Remediation
/llms-full.txt(currentlyHTTP 404): Publish consolidated plain-text product & architecture corpus so RAG pipelines bypass 88 KB HTML / 40 script tags./pricing.md(currentlyHTTP 404): Expose deterministic plain-text USD tier table, quotas, and enterprise terms so answer engines cite verified pricing./.well-known/ai.txt(currentlyHTTP 404): Publish machine discovery pointer indexing /llms.txt, /ai/summary.json, and agent tool manifests./.well-known/mcp.json(currentlyHTTP 404): Expose Model Context Protocol discovery card so Claude Code, Cursor, and MCP registries discover official tools./.well-known/agent-card.json(currentlyHTTP 404): Add A2A v0.2.5 Agent Card declaring capability skills, authentication mode, and rate limits./.well-known/openapi.json(currentlyHTTP 404): Serve OpenAPI 3.1 JSON contract for deterministic function-calling and WebMCP execution./ai/summary.json(currentlyHTTP 404): Serve structured JSON entity profile, product category, and canonical support endpoints.Schema.org @graph(0 JSON-LD blocks on/): Embed linkedOrganization,SoftwareApplication, andFAQPageJSON-LD in root HTML./robots.txt(13 AI crawlers disallowed): Review whether search/citation bots (OAI-SearchBot,Claude-SearchBot,PerplexityBot) are unintentionally blocked alongside training crawlers.
Inspect starter /llms.txt template for x402.org
# x402 > x402 is the internet's payment standard. An open standard for internet-native payments that empowers agentic payments at scale. Build a more free and fair internet. ## Core Machine Discovery (https://x402.org) - [Full AI Knowledge Corpus](https://x402.org/llms-full.txt): Single-file technical architecture & product reference - [Deterministic Pricing](https://x402.org/pricing.md): Verified tier & enterprise fee schedule - [Direct Answer Blocks](https://x402.org/answers.md): 40-60 word citable BOFU answers - [Entity Summary JSON](https://x402.org/ai/summary.json): Structured JSON profile & WebMCP tools (verified 2026-11-14) - [MCP Discovery Manifest](https://x402.org/.well-known/mcp.json): Agentic discovery endpoints - [A2A Agent Card](https://x402.org/.well-known/agent-card.json): Agent-to-Agent v0.2.5 capability card - [OpenAPI 3.1 Tool Spec](https://x402.org/.well-known/openapi.json): Deterministic agent function-calling contract - [AI Knowledge RSS Feed](https://x402.org/feed.xml): Machine-readable update feed
One-time $49 · 26 files · Base USDC or Monero · no signup
Download free 3-file starter for x402.org (.txt) · EdgeScreen x402 ($0.002)
23 remaining production files
/.well-known/mcp.json, agent-card.json, openapi.json, llms-full.txt, pricing.md, answers.md, ai/*.json
Schema.org JSON-LD bundle, Cloudflare Worker edge headers, comparisons, GitHub Action CI verifier.
4. Embeddable Live Score Badge (Free README / Docs Widget)
Embed x402 Protocol’s verified AI Search Readiness badge in GitHub READMEs, engineering docs, or status pages:
View Markdown & HTML badge code
[](https://asostudio.dev/audits/x402/) <a href="https://asostudio.dev/audits/x402/"><img src="https://asostudio.dev/badge/x402.svg" alt="x402 Protocol AI Search Readiness: 61/100 (C+)" width="196" height="22"></a>
5. 1-Click Live Re-Scan & Custom Domain Check
Re-run our 47-check Cloudflare edge probe against x402.org right now, or test your own domain:
6. Self-Serve 26-File ASO Pack ($49)
Generate a tailored 26-file /llms-full.txt, /pricing.md, 29-crawler robots.txt, Schema.org @graph, and 14-route Edge Router .zip for x402.org or any domain you operate. Instant browser download via USDC on Base (Chain 8453), or Monero (XMR — verified within 24h) via non-custodial Trocador AnonPay. Inspect free sample .zip · Terms · EdgeScreen x402 ($0.002 USDC).
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