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

$0.05/model · billed per model queried, so all 5 models = $0.25. 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)	Models to query. Defaults to all.

Request

curl https://api.cite42.dev/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://…", "title": "…", "citedBy": ["chatgpt", "perplexity"], "count": 2 }
  ],
  "lookup": { "url": "yourbrand.com/blog/aeo", "cited": true, "citedBy": ["chatgpt"] },
  "requestId": "…",
  "billing": { "cost": { "usd": "0.20" }, "balance": { "usd": "13.92" } }
}