LLM Mentions API
Find where your brand, domain, or keyword shows up in ChatGPT and Google AI Overviews. Search a pre-indexed corpus of 253M+ LLM prompts from $0.20/call.
Search a pre-indexed corpus of LLM answers for any domain or keyword across ChatGPT and Google AI Overviews. Get the actual AI-generated answers, the sources they cite, AI search volume per question, mentioned brand entities, and the fan-out queries the LLM derived from the original prompt — far cheaper than re-scraping LLMs live and 100× the coverage.
Try it live
Fill in the fields and hit Run to see a real response.
{
"ok": true,
"data": {
"platform": "google",
"totalCount": 1842,
"itemsCount": 1,
"currentOffset": 0,
"searchAfterToken": "eyJDdXJyZW50T2Zmc2V0IjoxLC...",
"mentions": [
{
"platform": "google",
"modelName": "google_ai_overview",
"locationCode": 2840,
"languageCode": "en",
"question": "what is the best seo api",
"answer": "Several SEO APIs stand out in 2026, including YepAPI for keyword research and SERP data...",
"sources": [
{
"position": 1,
"title": "Keywords API — YepAPI",
"url": "https://yepapi.com/seo-api/keywords",
"domain": "yepapi.com",
"sourceName": "YepAPI",
"snippet": "Bulk keyword metrics: search volume, CPC, competition, difficulty, intent...",
"thumbnail": null,
"markdown": null,
"publicationDate": null
}
],
"searchResults": null,
"aiSearchVolume": 1200,
"monthlySearches": [
{
"year": 2026,
"month": 4,
"searchVolume": 1200
},
{
"year": 2026,
"month": 3,
"searchVolume": 980
}
],
"firstResponseAt": "2026-02-11 08:14:00 +00:00",
"lastResponseAt": "2026-05-15 22:41:00 +00:00",
"brandEntities": null,
"fanOutQueries": null
}
]
}
}Features
Query a pre-built corpus of over 253 million LLM prompts and answers, so you analyze AI visibility across a vast history instead of paying to re-scrape models one query at a time.
Each target is a { domain } or { keyword } entry (1–10 per call) with the platform field choosing ChatGPT or Google AI Overview, so you scope the search precisely.
Results carry aiSearchVolume per question plus a monthlySearches history, letting you rank AI prompts by demand and track how that demand moves over time.
The brandEntities and fanOutQueries fields surface the brands an answer names and the sub-queries the LLM derived, so you find mentions even when your domain is not cited.
Set limit up to 1000 per call and page past 9000 results via the searchAfterToken; billing adds $0.002 per row on top of the $0.20 base.
Use cases
AI Visibility Tracking
Audit every prompt where your domain shows up as a cited source in Google AI Overviews and ChatGPT — track share-of-voice against competitors.
Competitor LLM Audit
See which competitor domains the LLMs cite for your target keywords, then reverse-engineer the content earning those citations.
Prompt Discovery
Surface every AI-search question driving traffic to your category — `aiSearchVolume` ranks them by demand.
Brand Mention Monitoring
Use `brandEntities` to find every AI answer where your brand is mentioned, even when your domain isn't cited.
Quick start
Copy this snippet and start making calls.
const res = await fetch('https://api.yepapi.com/v1/seo/ai/llm-mentions', {
method: 'POST',
headers: {
'x-api-key': 'YOUR_API_KEY',
'Content-Type': 'application/json',
},
body: JSON.stringify({
"target": [
{
"domain": "yepapi.com",
"search_filter": "include"
},
{
"keyword": "seo api",
"search_scope": [
"answer"
]
}
],
"platform": "google",
"location": "us",
"language": "en",
"limit": 100,
"filters": [
[
"ai_search_volume",
">",
100
]
],
"order_by": [
"ai_search_volume,desc"
]
}),
});
const data = await res.json();
console.log(data);The LLM mentions API for developers — search 253M+ AI answers for your brand, domain or keyword
The LLM Mentions API searches a pre-indexed corpus of 253M+ ChatGPT and Google AI Overview answers for any domain or keyword. Instead of re-scraping models live, you query a vast existing index and get the actual answers, their cited sources, per-question AI search volume, and the brands each answer mentions.
It is the scale tool in YepAPI's AI suite. Where the ChatGPT and Gemini scrapers capture one live query at a time, this endpoint reads across hundreds of millions of indexed prompts — far cheaper than live scraping for broad visibility audits, under the same key.
What is an LLM mentions API?
An LLM mentions API searches a stored corpus of AI-generated answers to find where a domain, brand, or keyword appears across LLM responses. Rather than running fresh model queries, YepAPI's version queries a pre-indexed set of 253M+ ChatGPT and Google AI Overview answers. Each result returns the question, the answer, its sources, an aiSearchVolume figure for that prompt, monthlySearches history, plus extracted brandEntities and fanOutQueries. That gives you AI share-of-voice at a scale live scraping cannot reach. It is served at /v1/seo/ai/llm-mentions, taking 1–10 targets with optional filters and ordering.
Build your own AI share-of-voice tool
Build an AI-visibility platform that audits every indexed prompt where a brand's domain is cited and charts share-of-voice against competitors. Use aiSearchVolume to rank which prompts matter most by demand, and the filters array (e.g. ai_search_volume > 100) to focus on high-traffic questions. The brandEntities field catches mentions even when your domain isn't the cited source, and fanOutQueries reveals the sub-questions LLMs derive — a map of the prompt space around your category that a live, one-query-at-a-time scraper could never assemble affordably.
LLM mentions API pricing — $0.20 + $0.002 per row returned
Each call is $0.20 plus $0.002 per row returned, so a 100-row visibility pull is about $0.40 and a deep 1000-row audit lands near $2.20. It is the priciest SEO endpoint because it searches a 253M+ answer index, but it replaces dozens of live scrapes. Dedicated AI-visibility platforms charge $0.50–$1.00 per call or monthly-only plans; here you query the corpus per request at a fraction of that, with pagination beyond 9000 results.
Audit AI share-of-voice at scale
Pass up to 10 targets — your domain plus competitors and category keywords — and order by aiSearchVolume to surface the highest-demand prompts in your space first. Because you are searching 253M+ indexed answers rather than firing live queries, you can map your entire category's AI footprint in a handful of calls. The monthlySearches history shows whether demand for each prompt is rising, and brandEntities reveals who else the LLMs name — competitive intelligence that scales with the corpus, not with your scraping budget.
Try the LLM mentions API free
Sign up for $5 of free credit, no credit card — enough for several thousand rows of LLM-mention data. Search your own domain and a competitor to confirm the answers, aiSearchVolume, and brandEntities fields return what you expect, and validate the corpus coverage before committing spend.
Start making API calls in 30 seconds
$5 free credit on signup. No credit card required. Pay per call.
What developers say
“Switched from SerpAPI and cut our SERP costs by 80%. Same data quality, way simpler billing.”
“One API key for AI models, SERP data, and web scraping. Saved us from managing 4 separate providers.”
“The $5 free credit let us prototype our entire rank tracking feature before committing. No other API does that.”
Frequently asked questions
Search a pre-indexed corpus of LLM answers for any domain or keyword across ChatGPT and Google AI Overviews. Get the actual AI-generated answers, the sources they cite, AI search volume per question, mentioned brand entities, and the fan-out queries the LLM derived from the original prompt — far cheaper than re-scraping LLMs live and 100× the coverage.
Each API call costs $0.20 (+$0.002 per row returned). No monthly minimums or subscriptions — you only pay for what you use.
Sign up for a free API key, then send a POST request to /v1/seo/ai/llm-mentions. Check the code example above for a ready-to-use snippet in JavaScript, cURL, or Python.
YepAPI bundles SEO, AI, and web scraping APIs under one key with no monthly minimums. You get lower per-call pricing, a unified dashboard, and one billing account instead of managing multiple providers.
Ready to integrate?
Get your API key and start making calls in 30 seconds. $5 free credit on signup — no credit card required.
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