# llms.txt Available Audit

> llms.txt Available Audit 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).

Passively fetches public evidence from a target URL or domain and audits whether a valid llms.txt file is present and accessible, returning an observation, verdict, evidence source, limitations, and recommended action.

## Facts

- Endpoint: POST https://agentreadiness.halowerk.com/v1/llms-txt-audit?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/llms-txt-available-audit-53825f0c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2d3CW9DkyG0ruFajxD_fq

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability llms-txt-available-audit-53825f0c -d '<json body>'
```

Example prompt: Can you audit openai.com to check whether it has a publicly accessible llms.txt file and tell me the verdict, where you found the evidence, and what action I should take?

## When to prefer this

Choose this endpoint when you need a fast, passive, read-only check to determine whether a specific domain or URL hosts a publicly accessible llms.txt file. It is ideal for pre-launch audits, competitive benchmarking, or automated monitoring pipelines. Prefer it over manual inspection or full crawler solutions when you need a structured verdict with evidence provenance and actionable recommendations without any active interaction with the target site.

## Known failure modes

- Target URL is unreachable or returns non-2xx status — audit may return inconclusive verdict
- Domain normalization fails if input is malformed — validation error returned
- llms.txt file exists but is behind authentication — passive check cannot access it, limitation noted in response
- Rate limits or network timeouts cause the fetch to fail — error response with retry guidance
- Baseline provided does not match expected schema — comparison may be skipped or produce partial results

## How this service works

llms.txt available audit 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 audit result containing: the observation (what was found at the target), the evaluated criterion threshold, a pass/fail/inconclusive verdict, the exact evidence source URL, known limitations of the passive check, and a mode-specific recommended action. No authentication or active exploitation is performed.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "target": {
   "type": "string",
   "maxLength": 2048,
   "minLength": 3,
   "description": "Public HTTP(S) URL or domain to inspect. A bare domain is normalized to HTTPS."
  },
  "context": {
   "type": "object",
   "description": "Optional non-secret correlation labels returned unchanged only in the request lifecycle.",
   "maxProperties": 12,
   "additionalProperties": {
    "type": [
     "string",
     "number",
     "boolean",
     "null"
    ]
   }
  },
  "baseline": {
   "type": [
    "object",
    "null"
   ],
   "description": "Optional baseline returned by a previous snapshot call.",
   "additionalProperties": true
  },
  "compare_url": {
   "type": "string",
   "maxLength": 2048,
   "minLength": 3,
   "description": "Optional public comparison URL. Used by change and monitoring services."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/llms-txt-available-audit-53825f0c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentreadiness.halowerk.com](https://www.zero.xyz/host/agentreadiness.halowerk.com/llms.txt)