Citations

Find which sources AI models cite for a query, with per-model counts; optionally check a specific URL.

Overview

Aggregate the URLs the models cite for a query, ranked by how many models cited each. Pass an optional url and the response adds a lookup telling you whether that specific URL was cited and by which models.

Reference

POST/v1/citations

$0.01-$0.07/model · billed per model queried, so all 5 models = $0.22. Pass models to query fewer.

Parameters

`query`required	string	The query to look up cited sources for.
`url`optional	string	Optional URL to check for. When set, the response reports whether it was cited.
`models`optional	array of enum (chatgpt \| claude \| perplexity \| gemini \| google_ai_overview)	Optional model subset. Omit to query all five AI surfaces (chatgpt, claude, perplexity, gemini, google_ai_overview). Pass ["perplexity"] or ["perplexity","claude"] when the user asks for specific surfaces or wants to reduce cost.

Request

curl https://www.cite42.dev/api/v1/citations \
  -X POST \
  -H "Authorization: Bearer $CITE42_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"query":"how to optimize for AI search","url":"yourbrand.com/blog/aeo"}'

Response

{
  "query": "how to optimize for AI search",
  "sources": [
    {
      "url": "https://example.com/ai-search-guide",
      "title": "AI search optimization guide",
      "citedBy": [
        "chatgpt",
        "perplexity"
      ],
      "count": 2
    }
  ],
  "lookup": {
    "url": "yourbrand.com/blog/aeo",
    "cited": true,
    "citedBy": [
      "chatgpt"
    ]
  },
  "requestId": "…",
  "billing": {
    "cost": {
      "microCredits": 22000,
      "usd": "0.22"
    },
    "balance": {
      "microCredits": 1336000,
      "usd": "13.36"
    }
  }
}