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

> agentreadiness.halowerk.com – llms.txt Substantive Decision 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 live public evidence from a target URL and evaluates whether that site's llms.txt file meets substantive content quality criteria, returning a structured verdict with evidence source and recommended action.

## Facts

- Endpoint: POST https://agentreadiness.halowerk.com/v1/llms-substantive-decision?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-decision-352b384d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_kfDMsGQmakWEC6I50xHXg

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-decision-352b384d -d '<json body>'
```

Example prompt: Check whether the llms.txt file on stripe.com is substantive — I need to know if it has enough real content to pass quality standards, with the actual evidence source and any limitations.

## When to prefer this

Use this endpoint when you need a passive, read-only quality verdict specifically about whether a site's llms.txt content is substantive — not merely whether the file exists. Prefer this over the availability decision endpoint when you already know llms.txt is present and want to evaluate its content depth. Prefer this over generic crawler audits when the focus is llms.txt quality compliance specifically.

## Known failure modes

- Target URL is unreachable or returns non-200 status — endpoint may return an observation of unavailability with a fail verdict
- llms.txt file does not exist at the target — verdict will reflect absence rather than a quality evaluation
- Target redirects or blocks crawler user-agents — evidence may be incomplete, noted in limitations field
- Malformed or non-HTTPS URL — input validation error returned
- Baseline object does not match target — comparison may be skipped or flagged as incompatible

## How this service works

Substantive llms.txt 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

A structured response containing: the observed llms.txt content or absence thereof, the quality threshold applied, a pass/fail verdict, the exact URL where evidence was sourced, known limitations of the passive check, and a recommended mode-specific action. No authentication, login, or form submission 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-decision-352b384d/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)