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llms.txt Availability Decision Check
x402
llms.txt Availability Decision Check is a paid API for AI agents from agentreadiness.halowerk.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-14).
Fetches public evidence from a target URL or domain and evaluates whether a valid llms.txt file is available, returning a structured verdict with observation, threshold, evidence source, limitations, and recommended action.
Price / call$0.001
Success—
StatusUnknown
How this service works
llms.txt available decision fetches current public evidence from the supplied target and evaluates the documented criterion. It returns the observation, threshold, verdict, exact evidence source, limitations and a mode-specific action. The check is passive: no login attempt, payload injection, exploit, purchase, form submission or load test is performed.
Output
Returns a structured JSON object containing: the observation (what was found at the target), the threshold being evaluated, a pass/fail verdict, the exact evidence source URL, any limitations of the passive check, and a mode-specific recommended action. No login, form submission, or exploit is performed.
Example use cases
Pre-integration agent readiness check
“Before I wire up my AI agent to scrape docs from docs.acmecorp.com, can you check if they have an llms.txt file available and tell me whether it passes the standard?”
Competitor AI discoverability audit
“I want to know if my competitor openwidgets.io has an llms.txt set up — check the site and give me a verdict with the evidence source.”
Continuous monitoring for llms.txt presence
“We just launched llms.txt on our site at mybrand.ai — can you verify it's actually publicly available and meets the threshold so I know the rollout worked?”
Technical details
Endpoint
POSThttps://agentreadiness.halowerk.com/v1/llms-txt-decision?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a passive, non-invasive check of whether a specific domain or URL exposes a valid llms.txt file for AI agent discoverability. Prefer this over general crawl or SEO audit tools when you specifically need a structured verdict aligned to the llms.txt standard, with evidence sourcing and actionable next steps. Ideal for pre-integration checks, compliance monitoring, or competitive auditing of AI readiness.
Side effects
- Target URL is unreachable or returns non-200 status — verdict may be 'fail' with a network error observation
- Domain normalized to HTTPS but site only serves HTTP — may result in false negative
- llms.txt present but malformed — observation may note file exists but verdict may still fail
- Rate limiting or bot blocking on the target site — evidence fetch may be incomplete
- compare_url or baseline provided but incompatible format — ignored or causes schema error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| target | string | Public HTTP(S) URL or domain to inspect. A bare domain is normalized to HTTPS. |
| context | object | Optional non-secret correlation labels returned unchanged only in the request lifecycle. |
| baseline | — | Optional baseline returned by a previous snapshot call. |
| compare_url | string | Optional public comparison URL. Used by change and monitoring services. |
Tags
x402
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