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CanaryGuard URL Agent Readiness Auditor
x402
CanaryGuard URL Agent Readiness Auditor is a paid API for AI agents from canaryguard-402.onrender.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-16).
Audits a domain or URL for AI agent readiness signals (llms.txt, .well-known/x402, openapi.json, MCP server card) and detects hidden CSS/DOM prompt-injection traps.
Price / call$0.01
Success—
StatusUnknown
How this service works
Audits any domain or URL for AI agent readiness (llms.txt, .well-known/x402, openapi.json, MCP server card) and detects hidden CSS/DOM prompt-injection traps.
Output
Returns a structured report indicating whether the target URL/domain exposes key AI agent discoverability files (llms.txt, .well-known/x402, openapi.json, MCP server card), along with detection results for hidden CSS or DOM prompt-injection traps that could compromise an AI agent visiting the page.
Example use cases
Pre-browse safety check for agent
“Before my agent visits https://shoppingsite.com to look for deals, can you check if the site has any hidden prompt-injection traps in its CSS or DOM that might hijack my agent's behavior?”
Vendor agentic readiness assessment
“I'm evaluating vendors for our agentic pipeline — can you audit https://vendor-api.io to see if they have llms.txt, an openapi.json, an MCP server card, and x402 payment support set up?”
Self-audit before agent marketplace listing
“We're about to list our service on an agent marketplace — can you audit https://myservice.dev to confirm we have all the right agent-readiness files in place and no accidental prompt-injection vulnerabilities?”
Technical details
Endpoint
GEThttps://canaryguard-402.onrender.com/v1/url-agent-readiness?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to assess whether a website is safe and properly configured for AI agent interaction — specifically when you want to check for standard agentic discoverability signals (llms.txt, openapi.json, MCP, x402) AND simultaneously scan for hidden prompt-injection traps. It is more comprehensive than a simple file-existence check because it combines readiness auditing with adversarial trap detection in one call.
Side effects
- URL is unreachable or times out — endpoint may return an error or partial results
- Domain blocks headless/automated requests — some checks may fail silently
- False negatives on prompt injection if obfuscation techniques are novel
- Malformed URL input causes validation error
- Target site uses bot-detection that prevents deep DOM inspection
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string |
Tags
x402
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