# agentreadiness.halowerk.com – llms.txt Substantive Audit

> agentreadiness.halowerk.com – llms.txt Substantive 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).

Fetches and evaluates a target site's llms.txt file for substantive compliance, returning a verdict, evidence source, observations, thresholds, limitations, and recommended action.

## Facts

- Endpoint: POST https://agentreadiness.halowerk.com/v1/llms-substantive-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/agentreadiness-halowerk-com-llms-txt-substantive-audit-a1be1c67
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_igv6m_K7FzuhAaWu95Lg5

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 agentreadiness-halowerk-com-llms-txt-substantive-audit-a1be1c67 -d '<json body>'
```

Example prompt: Can you do a substantive audit of llms.txt for https://example.com and tell me whether it passes the standard, what evidence was found, and what action I should take?

## When to prefer this

Use this endpoint when you need a substantive, evidence-backed verdict on whether a site's llms.txt file meets the documented standard — as opposed to merely checking its existence or repairability. It is the right choice when you want both a verdict and the underlying evidence source, especially for compliance reporting or before publishing AI-accessible content.

## Known failure modes

- Target URL is unreachable or returns non-2xx response, resulting in inability to fetch evidence
- llms.txt file is absent or malformed, yielding a fail verdict with noted limitations
- Domain normalization may silently redirect to unexpected page
- Rate limits or paywalls on the target may block evidence retrieval
- Baseline comparison fails if supplied baseline schema does not match current format

## How this service works

Substantive llms.txt 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 result containing: an observation describing what was found, the threshold being evaluated against, a pass/fail/warning verdict, the exact evidence source URL, any limitations of the check, and a mode-specific recommended action. The check is passive — no login, payload injection, form submission, or load testing 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/agentreadiness-halowerk-com-llms-txt-substantive-audit-a1be1c67/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)