# Vextorium Agent-Readiness Checker

> Vextorium Agent-Readiness Checker is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.006/call, status unknown (last checked 2026-10-12).

Checks whether a given website is properly configured for AI agent discovery by scanning for standard AI-readiness files and signals.

## Facts

- Endpoint: POST https://api.vextorium.com/v1/agent-readiness?utm_source=zero.xyz
- Price: $0.006/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/vextorium-agent-readiness-checker-1b4134ce
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6mwE1RbrVM3m3OCYS6XkK

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 vextorium-agent-readiness-checker-1b4134ce -d '<json body>'
```

Example prompt: Can you check whether https://example.com is properly set up for AI agents — does it have llms.txt, an OpenAPI spec, x402 support, and does it allow AI bots in its robots.txt?

## When to prefer this

Use this endpoint when you need to programmatically audit whether a website exposes the standard AI-agent discovery files (llms.txt, openapi.json, mcp.json, ai-plugin.json, x402) and allows AI bots via robots.txt. Prefer this over manual inspection when building agent pipelines that need to auto-discover compatible endpoints, or when vetting third-party APIs for agent integration.

## Known failure modes

- Target URL is unreachable or returns timeout — scan may return partial results
- Invalid or malformed URL input causes validation error
- Target site blocks the scanner's requests — results may show false negatives
- Rate limiting on the target site may affect status codes returned

## How this service works

How ready a website is for AI agents: llms.txt, AI-crawler rules in robots.txt, sitemap, x402 payment discovery, OpenAPI, MCP manifest, security.txt, with a 0-100 score and concrete recommendations.

## Output

Returns a JSON object with an overall readiness score (0–100), per-file existence checks (llms.txt, llms-full.txt, openapi.json, sitemap.xml, mcp.json, ai-plugin.json, x402, security.txt) each with URL, HTTP status code, and boolean exists flag, plus a robots.txt breakdown listing which AI bots are permitted or blocked, and an array of actionable recommendations.

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "required": [
      "url"
     ],
     "properties": {
      "url": {
       "type": "string"
      }
     }
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": [
      "object",
      "null"
     ],
     "properties": {
      "site": {
       "type": [
        "string",
        "null"
       ]
      },
      "files": {
       "type": [
        "object",
        "null"
       ],
       "properties": {
        "mcp": {
         "type": [
          "object",
          "null"
         ],
         "properties": {
          "url": {
           "type": [
            "string",
            "null"
           ]
          },
          "code": {
           "type": [
            "number",
            "null"
           ]
          },
          "exists": {
           "type": [
            "boolean",
            "null"
           ]
          }
         }
        },
        "x402": {
         "type": [
          "object",
          "null"
         ],
         "properties": {
          "url": {
           "type": [
            "string",
            "null"
           ]
          },
          "code": {
           "type": [
            "number",
            "null"
           ]
          },
          "exists": {
           "type": [
            "boolean",
            "null"
           ]
          }
         }
        },
        "openapi": {
         "type": [
          "object",
          "null"
         ],
         "properties": {
          "url": {
           "type": [
            "string",
            "null"
           ]
          },
          "code": {
           "type": [
            "number",
            "null"
           ]
          },
          "exists": {
           "type": [
            "boolean",
            "null"
           ]
          }
         }
        },
        "sitemap": {
  
… (truncated)
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "site": "https://vextorium.com",
  "files": {
   "mcp": {
    "url": "https://vextorium.com/.well-known/mcp.json",
    "code": 404,
    "exists": false
   },
   "x402": {
    "url": "https://vextorium.com/.well-known/x402",
    "code": 200,
    "exists": true
   },
   "openapi": {
    "url": "https://vextorium.com/openapi.json",
    "code": 404,
    "exists": false
   },
   "sitemap": {
    "url": "https://vextorium.com/sitemap.xml",
    "code": 200,
    "exists": true
   },
   "llms_txt": {
    "url": "https://vextorium.com/llms.txt",
    "code": 200,
    "exists": true
   },
   "ai_plugin": {
    "url": "https://vextorium.com/.well-known/ai-plugin.json",
    "code": 404,
    "exists": false
   },
   "security_txt": {
    "url": "https://vextorium.com/.well-known/security.txt",
    "code": 200,
    "exists": true
   },
   "llms_full_txt": {
    "url": "https://vextorium.com/llms-full.txt",
    "code": 404,
    "exists": false
   }
  },
  "score": 75,
  "robots": {
   "detail": {
    "CCBot": "permitido",
    "GPTBot": "permitido",
    "YouBot": "permitido",
    "Diffbot": "permitido",
    "Amazonbot": "permitido",
    "ClaudeBot": "permitido",
    "cohere-ai": "permitido",
    "Bytespider": "permitido",
    "Claude-User": "permitido",
    "ChatGPT-User": "permitido",
    "anthropic-ai": "permitido",
    "DuckAssistBot": "permitido",
    "OAI-SearchBot": "permitido",
    "PerplexityBot": "permitido",
    "MistralAI-User": "permitido",
    "Google-Extended": "permitido",
    "Perplexity-User": "permitido",
    "Claude-SearchBot": "permitido",
    "Applebot-Extended": "permitido",
    "meta-externalagent": "permitido"
   },
   "exists": true,
   "blocked_ai_bots": 0
  },
  "recommendations": [
   "If you offer an API, publish its OpenAPI or an MCP server so agents can use it on their own."
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/vextorium-agent-readiness-checker-1b4134ce/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.vextorium.com](https://www.zero.xyz/host/api.vextorium.com/llms.txt)