# Mudko AI Citation Check

> Mudko AI Citation Check is a paid API for AI agents from mudko.com, paid per call via x402, $0.5/call, status unknown (last checked 2026-09-16).

Runs live probes against major AI assistants to determine whether a domain is cited when users ask buying questions in its vertical, returning citation rates, list positions, competitor mentions, and agent-card discovery status.

## Facts

- Endpoint: GET https://mudko.com/api/x402/citation-check
- Price: $0.5/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mudko-ai-citation-check-ffb78457
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hldS-6P3t1OGQEuSzjGfY

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 mudko-ai-citation-check-ffb78457
```

Example prompt: Can you check whether mudko.com is being cited by major AI assistants like ChatGPT and Claude when people ask buying questions in the website analytics vertical — I want to see the citation rate per provider, which competitors are being mentioned instead, and whether my agent card was discovered?

## When to prefer this

Use this endpoint when you need a real-time, non-cached measurement of whether a specific domain is cited by live AI assistants for buying-intent queries. Prefer this over cached SEO rank trackers or static audits when freshness matters — e.g. after publishing new content, updating an agent card, or after a competitor campaign. Choose this over the sibling deep-scan endpoint when you only need citation presence data and not a full site quality audit.

## Known failure modes

- Missing required 'domain' query parameter returns 400 error
- Invalid or unresolvable domain returns empty or null provider results
- Payment not processed (x402) results in 402 Payment Required before probe runs
- AI provider APIs unavailable during probe window may return partial provider results
- Auto-detection of vertical fails for niche domains, requiring explicit 'vertical' parameter

## How this service works

Live AI-citation check: runs fresh probes against major AI assistants and reports whether a domain is cited for its vertical's buying questions — citation rate per provider, list position, and whether the domain's agent-card was discovered. Fresh probes per call (not cached). $0.50 per check. Free companion diagnosis: /api/x402/deep-scan.

## Output

Returns a structured object containing: the checked domain, per-provider citation results (array), overall citation rate (0–1), whether the domain's agent card was discovered (boolean), and a list of competitor domains mentioned by AI assistants instead of the queried domain.

## 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": [
      "domain"
     ],
     "properties": {
      "domain": {
       "type": "string",
       "description": "Bare domain to check citations for (required)."
      },
      "vertical": {
       "type": "string",
       "description": "Optional vertical id to pick prompt sets (auto-detected otherwise)."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "domain": {
       "type": "string"
      },
      "providers": {
       "type": "array"
      },
      "citation_rate": {
       "type": "number"
      },
      "agent_card_discovered": {
       "type": "boolean"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/mudko-ai-citation-check-ffb78457/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mudko.com](https://www.zero.xyz/host/mudko.com/llms.txt)