# citable.run AI Visibility Check

> citable.run AI Visibility Check is a paid API for AI agents from citable.run, paid per call via x402, $0.2/call, status unknown (last checked 2026-09-14).

Checks which AI answer engines (Perplexity, Gemini, OpenAI, Anthropic) cite a given domain in response to a specific prompt, using their official APIs.

## Facts

- Endpoint: GET https://citable.run/v1/ai-visibility
- Price: $0.2/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/citable-run-ai-visibility-check-a090c44a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1-4VeGwQezJvtLJV455ei

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 citable-run-ai-visibility-check-a090c44a
```

Example prompt: Check which AI answer engines — Perplexity, Gemini, OpenAI, and Anthropic — cite hubspot.com when someone asks 'what is the best CRM for small businesses?'

## When to prefer this

Use this endpoint when you need to verify whether a specific domain is being cited by AI answer engines for a particular query. It is the right choice over generic SEO tools when the focus is on AI-generated answers (not traditional search rankings), and when you need to check across multiple AI engines simultaneously with a single call. Prefer it over the sibling 'observed prompts' endpoint when you have a specific prompt in mind and want to test citation status proactively rather than discover existing citations retroactively.

## Known failure modes

- Domain not found in any citations — returns empty or zero-citation result
- Invalid or missing prompt parameter — returns validation error
- AI engine temporarily unavailable — may return partial results for configured engines
- Prompt too short or too long (must be 3–400 characters) — returns schema validation error
- Unrecognized engine name in optional engines parameter — may be silently ignored or return an error

## How this service works

AI-visibility check: which AI answer engines cite a domain for a prompt, via their official APIs.

## Output

Returns a per-engine breakdown showing whether the specified domain was cited in AI-generated answers for the given prompt, including which engines cited it, the specific cited URLs, and the answer snippets where citations appeared.

## 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": [
      "prompt",
      "domain"
     ],
     "properties": {
      "domain": {
       "type": "string",
       "description": "hostname to look for in the citations, e.g. example.com (subdomains match)"
      },
      "prompt": {
       "type": "string",
       "description": "the question a buyer would ask (3–400 chars)"
      },
      "engines": {
       "type": "string",
       "description": "optional comma list of perplexity,gemini,openai,anthropic (default: all configured — GET /api lists them under engines_configured)"
      }
     }
    }
   },
   "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/citable-run-ai-visibility-check-a090c44a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from citable.run](https://www.zero.xyz/host/citable.run/llms.txt)