# AEO LLMs.txt Readiness Checker

> AEO LLMs.txt Readiness Checker is a paid API for AI agents from payai.agentstools.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Checks a website's /llms.txt and /llms-full.txt files for presence, size, and structural validity per llmstxt.org spec, returning a readiness score and actionable fixes.

## Facts

- Endpoint: GET https://payai.agentstools.dev/aeo/llms
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/aeo-llms-txt-readiness-checker-e831d74d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_kcQICfgsPMFo1NscC6Mpy

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 aeo-llms-txt-readiness-checker-e831d74d
```

Example prompt: Can you check whether example.com has a valid llms.txt file — is it present, the right size, and does it have the proper H1 title, blockquote summary, and markdown link sections? Give me a readiness score and tell me what needs fixing.

## When to prefer this

Choose this endpoint when you specifically need a fast, cheap validation of a site's llms.txt and llms-full.txt files without running a full AEO audit. It is ideal when you only care about LLM discoverability file compliance, not the broader site-level AI engine optimization picture. Use the full AEO audit endpoint if you need a comprehensive multi-factor site readiness assessment.

## Known failure modes

- Target site is unreachable or returns non-2xx — no readiness score returned
- Site has no llms.txt or llms-full.txt — returns score of 0 with 'not found' fix suggestion
- Malformed URL or domain input — returns validation error
- Rate limiting or network timeout on the target domain — partial result or error
- llms.txt exists but is completely empty — low score with structural fix list

## How this service works

Focused check of a site's /llms.txt and /llms-full.txt: presence, size and llmstxt.org structural validity (an H1 title, a blockquote summary, sections of markdown links). Returns a readiness score plus fixes. Cheap sub-check of the full AEO audit.

## Output

Returns a readiness score (numeric) indicating how well the site's /llms.txt and /llms-full.txt conform to the llmstxt.org specification, along with presence/absence status, file sizes, structural validity flags (H1 title present, blockquote summary present, markdown link sections present), and a list of specific fixes to bring the files into compliance.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "url": {
       "type": "string",
       "description": "Target URL to audit (e.g. https://example.com)"
      },
      "host": {
       "type": "string",
       "description": "Alternative input: a hostname"
      },
      "domain": {
       "type": "string",
       "description": "Alternative input: a bare domain (e.g. example.com)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/aeo-llms-txt-readiness-checker-e831d74d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from payai.agentstools.dev](https://www.zero.xyz/host/payai.agentstools.dev/llms.txt)