# 402registry Agent Visibility Check (Single)

> 402registry Agent Visibility Check (Single) is a paid API for AI agents from 402registry.com, paid per call via x402, $0.1/call, status unknown (last checked 2026-10-16).

Checks whether a specified website is visible to major AI crawlers (GPTBot, ClaudeBot, PerplexityBot, OAI-SearchBot) and returns a dated badge and registry listing if it passes.

## Facts

- Endpoint: GET https://402registry.com/buy/one?utm_source=zero.xyz
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/402registry-agent-visibility-check-single-a4e2cc5b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HjB7aeHnZxS2pJh-VCjdj

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 402registry-agent-visibility-check-single-a4e2cc5b
```

Example prompt: Can you check whether my site example.com is actually visible to AI crawlers like GPTBot and ClaudeBot, and get me a dated badge and registry listing if it passes?

## When to prefer this

Choose this endpoint when you need a single, one-off AI crawler visibility check for a website and want a dated badge and public registry listing as proof of compliance. It is ideal for site owners who have just launched or updated their robots.txt and need immediate verification without an account or subscription. At $2/check (ENTRY pack), it is best suited for occasional checks; for frequent or bulk checks, higher-tier packs at 402registry.com offer better per-check rates.

## Known failure modes

- Site is blocking AI crawlers — returns a fail result with no badge issued
- Invalid or unreachable URL — endpoint may return an error or non-200 status
- Payment not completed — check is not executed without the $2 USDC payment
- Robots.txt disallows crawling — check may fail even if the site is live
- Rate limiting or transient network issues causing the check to time out

## How this service works

Pay-per-check discoverability audit: $0.10 to see what an AI crawler actually sees on your site — GPTBot, ClaudeBot, PerplexityBot, OAI-SearchBot, not a browser render. A passing check earns a dated badge and a registry listing. No account, no card, no human.

## Output

Returns a pass or fail result indicating whether the specified site is visible to major AI crawlers (GPTBot, ClaudeBot, PerplexityBot, OAI-SearchBot). On a passing check, the agent receives a dated compliance badge and a public registry listing confirming crawler accessibility.

## 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"
     ],
     "type": "string"
    },
    "headers": {
     "type": "object",
     "additionalProperties": {
      "type": "string"
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "pack": "one",
  "site": "https://example.com",
  "report": "https://402registry.com/r/<id>",
  "verdict": "listed",
  "checksLeft": 0
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/402registry-agent-visibility-check-single-a4e2cc5b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 402registry.com](https://www.zero.xyz/host/402registry.com/llms.txt)