# Setu Anantasutra: llms.txt Check

> Setu Anantasutra: llms.txt Check is a paid API for AI agents from setu.xyz23110928.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-23).

Checks whether a given domain has a valid llms.txt file, returning its status, title, sections, link count, and any format issues.

## Facts

- Endpoint: GET https://setu.xyz23110928.workers.dev/v1/llms-txt/check?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/setu-anantasutra-llms-txt-check-8a59a526
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_SBG9z3NzjBuN2fv_guU_j

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 setu-anantasutra-llms-txt-check-8a59a526
```

Example prompt: Can you check whether openai.com has a valid llms.txt file and tell me if there are any format issues with it?

## When to prefer this

Use this endpoint when you need to programmatically verify whether a specific domain has published an llms.txt file and whether it meets the spec, especially for AI agent workflows auditing AI-crawler readiness or content discoverability. It is purpose-built for the llms.txt standard and returns structured validation details, unlike generic HTTP HEAD checks.

## Known failure modes

- Domain does not exist or is unreachable — status may show 'missing'
- llms.txt present but malformed (e.g. missing H1 heading) — status 'invalid' with issues listed
- Network timeout fetching the domain's file
- Invalid or missing 'domain' query parameter returns an error

## How this service works

Pay-per-call JSON tools for AI agents: Indian identifier validation (GSTIN, PAN, TAN, CIN, LLPIN, IFSC, PIN code, UPI ID, vehicle registration), AI-visibility (GEO) audits, AI crawler robots.txt matrices and llms.txt checks. x402 (USDC on Base) or RapidAPI.

## Output

Returns a JSON object with the domain's origin URL, an overall status ('missing', 'valid', or 'invalid'), and a detailed llmsTxt object containing: whether the file is present, whether it's valid, a list of format issues, the title, parsed sections, and link count. Also reports whether llms-full.txt is present.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "domain"
     ],
     "properties": {
      "domain": {
       "type": "string",
       "maxLength": 253,
       "minLength": 3,
       "description": "Domain or URL, e.g. example.com"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "origin",
      "status",
      "llmsTxt"
     ],
     "properties": {
      "origin": {
       "type": "string"
      },
      "status": {
       "enum": [
        "missing",
        "valid",
        "invalid"
       ],
       "type": "string"
      },
      "llmsTxt": {
       "type": "object"
      },
      "llmsFullTxt": {
       "type": "object"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "origin": "https://example.com",
  "status": "invalid",
  "llmsTxt": {
   "title": null,
   "valid": false,
   "issues": [
    "first line is not an H1 (\"# Name\"), which the spec requires"
   ],
   "present": true,
   "sections": [],
   "linkCount": 0
  },
  "llmsFullTxt": {
   "present": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/setu-anantasutra-llms-txt-check-8a59a526/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from setu.xyz23110928.workers.dev](https://www.zero.xyz/host/setu.xyz23110928.workers.dev/llms.txt)